As the title says, what are your longest flights by airline?

Mine are:
MH: KUL-LAX
QR: DOH-DFW
DL: SEA-ATL
AA: KOA-PHX
UA: SFO-KOA
LH: FRA-ATL

HA LAS-HNL
WN SAN-MCO
DL CVG-LAX
G4 LEX-PIE

Sent from my SM-G996U using Tapatalk

Pan AM - SFO TO LAX
AA - DFW TO HNL
AZUL - FLL TO Campinas, Brazil
AS and B6 - Fll to SFO

In 1981 I traveled in a brand new PanAm 747SP from Hong Kong non stop to San Francisco

Top 10:

EZE-CDG. Air France
LHR-GRU. Varig
LHR-LAX. Air NZ
FRA-DEN. Lufthansa
LHR-IAH. Continental
LHR-DEN. BA & United
LHR-MIA. American
AMS-BOM. NWA.
MAN-ATL. Delta.

American: DFW-ICN
Air France: LAX-CDG
Japan Airlines: HND-HKG
Alaska: SEA-DFW
AirAsia X: KUL-OOL
Delta: PDX-ATL
Vueling: ATH-BCN
Sun Country: PDX-STL
Jetstar: OOL-AKL
Southwest: PHX-BWI
Czech Airlines: PRG-CPH
United/Spirit: ORD-PDX
China Eastern: NKG-YVR
Tarom: OTP-ATH
Norwegian: SEA-LGW
Level: OAK-BCN
Northwest: MEM-PDX
Jetstar Pacific: HKG-HAN
Swiss: JFK-ZRH
Thai AirAsia: HAN-DMK
Wizz: CIA-TSR
Lufthansa: MUC-ORD
AirAsia: REP-KUL
Air New Zealand: AKL-HNL
KLM: DFW-AMS

Just the main airlines:

QF - LHR-PER
VA (/DJ) - PER-BNE
JQ - BNE-TSV
TT - OOL-MEL
AN - DRW-ADL
NZ - CHC-BNE
LA - AKL- SYD
EK - BNE-AKL
SQ - BNE-SIN
JL - CTS-HND
NH - HND-CTS
AF - CDG-AMS
KL - AMS-CDG
SK - OSL-LHR
FI - CDG-KEF

As I have flown with over 120 airlines, I'll start off with airlines from my top 25 longest flown routes and then add below other airlines that I've flown over 10 flights with.

From the longest routes I've flown:

Air Canada: Toronto (YYZ) - Tokyo Narita (NRT) / 5568 nmi
American Airlines: London Heathrow (LHR) - New York Kennedy (JFK) / 2999 nmi
British Airways: London Heathrow (LHR) - Johannesburg (JNB) / 4884 nmi
Emirates: Dubai (DXB) - Paris Charles de Gaulle (CDG) / 2832 nmi
Etihad: Abu Dhabi (AUH) - Kuala Lumpur (KUL) / 3018 nmi
Iberia: Madrid (MAD) - Bogota (BOG) / 4337 nmi
KLM: Panama City Tocumen (PTY) - Amsterdam (AMS) / 4762 nmi
Icelandair: Keflavik (KEF) - San Francisco (SFO) / 3653 nmi
Lufthansa: Frankfurt am Main (FRA) - Orlando Int'l (MCO) / 4123 nmi
Norwegian Long Haul: Oslo Gardermoen (OSL) - Orlando Int'l (MCO) / 4015 nmi
Qatar Airways: Doha Hamad (DOH) - Dallas/Ft. Worth (DFW) / 6892 nmi
SAS Scandinavian: Copenhagen (CPH) - Beijing Capital (PEK) / 3896 nmi
Singapore Airlines: Houston George Bush (IAH) - Manchester (MAN) / 4096 nmi
TAP Portugal: Newark (EWR) - Porto (OPO) / 2902 nmi
United Airlines: Newark (EWR) - Frankfurt am Main (FRA) / 3363 nmi
Virgin Atlantic: New York Kennedy (JFK) - London Heathrow (LHR) / 2999 nmi

Now, for some other airlines I've had the pleasure to fly with semi-frequently through the years:

Air Atlanta Icelandic: Keflavik (KEF) - Gran Canaria (LPA) / 2182 nmi
Air Iceland: Reykjavik (RKV) - Kulusuk (KUS) / 397 nmi
Air France: Marseille (MRS) - Paris Charles de Gaulle (CDG) / 352 nmi (lots of short hops!)
AirTran Airways: Boston (BOS) - Atlanta (ATL) / 822 nmi
Canadian North: Edmonton (YEG) - Yellowknife (YZF) / 551 nmi
CSA Czech: Prague (PRG) - Keflavik (KEF) / 1437 nmi
Delta Air Lines: Keflavik (KEF) - New York Kennedy (JFK) / 2253 nmi
Eagle Air Iceland: Höfn í Hornafirði (HFN) - Reykjavik (RKV) / 176 nmi
easyJet: Gran Canaria (LPA) - London Gatwick (LGW) / 1553 nmi
Islandsflug: Reykjavik (RKV) - Egilsstadir (EGS) / 206 nmi
jetBlue Airways: Boston (BOS) - Denver (DEN) / 1524 nmi
Norlandair: Akureyri (AEY) - Vopnafjordur (VPN) / 80 nmi
Southwest Airlines: Tampa (TPA) - New York LaGuardia / 878 nmi
Vueling: Keflavik (KEF) - Barcelona (BCN) / 1612 nmi
WOW air: Berlin Schönefeld (SXF) - Keflavik (KEF) 1317 nmi

AA: DFW-IAH
BA: BWI-LHR
B6: JFK-SEA
4O: MEX-TIJ
COA: IAH-SEA
DL: ATL-SAN
J7: CAK-ATL
NWA: MSP-SEA
TAP: LIS-JFK
TWA: MSY-STL
UA: IAH-SFO
US: PIT-DFW
WN: DEN-PHL

On the top 10:
Qantas: MEL-LAX 6896nmi
Cathay: LAX-HKG 6305nmi
Virgin Australia: BNE-LAX 6234nmi
Philippine: MNL-SFO 6069nmi
Turkish: IST-LAX 5964nmi
Air China: JFK-PEK 5934nmi
United: EWR-PEK 5929nmi
British Airways: LHR-KUL 5732nmi
Sichuan: LAX-HGH 5720nmi
tie Delta/China Eastern: PVG-LAX 5630nmi

CX: HKG-BOS return
JL: NRT-BOS return
KL: SIN-AMS

NZ AKL-NRT
QF SYD-BKK
VA AKL-RAR
JQ AKL-DUD
FJ AKL-NAN
SJ HLZ-NAN
EK BKK-SYD
SQ AKL-SIN
TG AKL-BKK
TR SIN-ATH
CO AKL-HNL

There are other short domestic ones.

Taking the longest route with each airline I have flown my top ten are:
MAD - SCL LA
LHR - KUL MH
LHR - HKG BA and VS
LHR - SIN QF AND SQ
LHR- BKK TG
LHR - GRU RG
LHR - YVR AC
JFK - GRU UA
MAD - HAV IB

At the other end of the spectrum my three shortest longest routes by airline are:

ADL - KGC Lloyd Aviation
LGW - BRS Brymon
MAN - LCY VLM

Emirates: DXB-SYD
Air New Zealand: AKL-LAX
Qantas: LHR-BKK
British Airways: LHR-SEA
Virgin Atlantic: LHR-LAX
Cathay: LHR-HKG
Singapore Airlines: SIN-LHR
Air Canada: YVR-LHR
Norwegian: LAX-LGW
LAN: SYD-AKL
American: ORD-LHR

Not including short haul.

A quick sampling of my longest flights includes:

Aeromexico: JFK-MEX
American Airlines: DFW-PVG
British Airways: IAD-LHR
Continental: STX-EWR
Delta: CVG-LGW
Frontier: DCA-DEN
JetBlue: IAD-FLL
Sabena: JFK-BRU
Southwest: BWI-ALB
Spirit: BWI-MYR
Swissair: GVA-JFK
United: ORD-NRT
Virgin: LHR-JNB

For me:
Aer Lingus: DUB-PHL (EI115) on the 757-200 (EI-LBT), 3,268nm in 7:55
Air France: CDG-IAD (AF26) on the 777-300ER (F-GZNC), 3,855nm in 8:35
Alaska: BWI-LAX (AS739) on the 737-900ER (N408AS), 2,326NM in 5:35. Think this is the only time my flight number has matched the aircraft type!
American: BWI-CLT (AA609) on the A321 (N584UW), 361nm in 1:43
British Airways: LHR-IAD (BA217) on the A380 (G-XLEB), 3,671nm in 8:25
Delta: EZE-ATL (DL110) on the A330-300 (N823NW), 5,023nm in 10:16
Frontier: DEN-BWI (F9226) on the A320 (N205FR), 1,489nm in 3:19
Lufthansa: FRA-PHL (LH426) on the A340-300 (D-AIGF), 3,943nm in 8:25
Southwest: BWI-SAN (WN75) on the 737-700 (N443WB), 2,293nm in 4:35
Spirit: BWI-FLL (NK443) on the A320neo (N907NK), 929nm in 2:35
United: BWI-SFO (UA753) on the A320 (N518UA), 2,454nm in 6:06
--Bonus - Ted: DEN-RNO (UA915) on the A320 (N481UA), 803nm in 2:19
US Airways: BWI-PHX (US673) on the A320 (N656AW), 1,997nm in 4:09

Just a few that I remember:
AC: YYZ-ICN
AF: BLR-CDG
AR: JFK-EZE
KL: AMS-CPT
UA: LAX-SYD

Strangely enough, although I fly Delta a fair amount, none of my DL flights have been particularly long; nothing over ATL-FRA that I can think of.

Cathay Pacific ORD to HKG 15 hours and 4 minutes from takeoff until landing.

Delta: 14 hours on DL275, DTW-HND in 2016, was supposed to be on a 747-400, but it unfortunately was subbed out for a 777-200LR. Flew the OG Delta business class (the product before D1) on this flight.

Honorable mention goes to my flight from Munich-Detroit, also on a 777-200LR, a crazy headwind caused the flight to be 9 hours long.


KLM (only flown once): AMS-MUC (in 2013), 737-800

Air France: CDG-LAX, La Premiere, AFR066, on a 777-300ER, another unfortunate substitution after being previously placed on the A380. At least LP is better on the 777.

jetBlue: KJFK-KLAX, A321Neo in the mint studio.

KPTKRampy wrote:

Delta: 14 hours on DL275, DTW-HND in 2016, was supposed to be on a 747-400, but it unfortunately was subbed out for a 777-200LR. Flew the OG Delta business class (the product before D1) on this flight.

Wait so you had to fly the herringbone product?? Oh no. At least you survived it lol. I haven’t heard good things about it. At least it wasn’t ATL-JNB or some other longer flight

VARIG: NGO-GIG
JAL: NRT-GRU
Malaysia: KUL-EZE
Air France: CDG-PPT
LAN: SCL-SYD
Qantas: SYD-EZE
South African: TPE-JNB
AeroMexico: MEX-NRT
ANA: NRT-MEX
Delta: NRT-ATL

Some of the longer flights

AA: HKG-LAX
AC: YYZ-ZRH
AS: OGG-SEA
DL: DTW-LHR
F9: DEN-LGA
FI: DEN-KEF
LH: EWR-DUS
NZ: LAX-AKL
SK: ARN-ORD
SQ: SIN-HKG
UA: LAX-SIN
WN: SEA-MDW

Pan Am: LHR-JFK
Swiss: ZRH-BOS
TWA: ORD-LHR

Qantas: LAX-SYD (Longest overall)
Lufthansa: FRA-SFO
American: DFW-LHR
SAS: ORD-ARN
United: FRA-IAD
Brussels Airlines: BRU-EBB
Continental: FRA-EWR
Delta: KEF-MSP

After that it's all airlines I've only used for domestic or intra-European flights.

Boeing757100 wrote:

Wait so you had to fly the herringbone product?? Oh no. At least you survived it lol. I haven’t heard good things about it. At least it wasn’t ATL-JNB or some other longer flight

Yes, I personally didn’t really care for it, but this was before D1, so there was no other choice. If I had to do that flight again, or somewhere that’s a long haul, I’m making sure I’m getting a D1 seat.

Not all inclusive, but the long ones that come to mind

DL - LAX-NRT
AA- GRU-DFW
UA - SFO-SYD
NW- ORD -SEL
AF - SFO-CDG
CX - SFO-HKG
TK- SFO-IST
CI - SFO-TPE
BR - SFO-TPE
KE - SFO-ICN
KL- SFO-AMS
VS- SFO-LHR
LH- SFO-MUC
SK- SFO-CPH
BA - LHR - CPT

DL: SLC-CDG
LH: DEN-FRA
AS: PHL-SEA
UA: IAH-PDX
AA: PDX-DFW
WN: MDW-SLC
F9: DEN-PDX
NK: LAS-PDX
SU: KUF-SVO
9K: BOS-PVC
RZ: SJO-XQP

WN: HOU-PDX x 5 / PDX-HOU x4
KL: AMS-IAH x4 / IAH-AMS x2
UA: AMS-IAH
CO: IAH-FRA / FRA-IAH
LH: IAH-FRA / FRA-IAH
AS: SEA-IAH
AF: IAH-CDG
U2: EDI-AMS
DL: AMS-PDX
AC: YVR-LHR

UA: SFO-AMS on B787-9 in 2019, my favorite flight of all time or ICN-SFO on B747-400 in 2016
AS: SJC-SEA
SQ: SFO-SIN
U2: AMS-FCO
KE: IAD-ICN, was about to but cancelled, trying for SFO-ICN next year in 2023
OZ: ICN-SFO, was about to but cancelled, going to merged with KE
B6: SMF-BOS
CO: SMF-IAH, defunct
BR: SFO-TPE
JL: SFO-HND or JFK-HND, cancelled before flight, probably rebooked on KE from IAD-ICN and still got cancelled
DL: IAD-ICN, a codeshare agreement with KE but still counts, cancelled as well as a codeshare, trying next year on SFO-ICN
CX: HKG-SFO

Only counting inter-continental sectors, otherwise the list would be too long:
AC: LHR-YYC
DL: JFK-FRA
HA: HNL-BNE
NW: LAX-SYD
PA: SYD-NAN-HNL-LAX
UA: LAX-SYD
US: PHL-CDG

AR: EZE-RGL-AKL (worst flight of all time!)

AF: ICN-CDG
AZ: SYD-MEL-BKK
BA: LHR-MCT-SIN-BWN-SYD
KL: AMS-NRT
LH: FRA-SIN
LO: WAW-PEK
LX: PEK-ZRH
NG: SYD-MEL-BKK-VIE
SN (Sabena); BRU-BJM-KGL-EBB
TK: BKK-IST

SA: HKG-SEZ-JNB
TM: MPM-CDG

AN: SYD-HKG
FJ: NAN-LAX
NZ: SYD-LAX
QF: MEL-LAX
VA: BNE-LAX

AI: JFK-LHR
BI: BWN-BKK-AUH-FRA
D7: OOL-KUL
EK: DXB-BNE
GF: AUH-BAH-LHR
KU: JFK-FRA
WY: KUL-MCT

CA: LAX-PEK
CI: TPE-FCO
CX: SYD-HKG
GA: CGK-AMS-LGW
MH: KUL-CDG
OD: BNE-DPS-KUL
PR: SYD-CEB
SQ: SIN-LHR
TG: MUC-BKK

0hAerqplane wrote:

UA: SFO-AMS on B787-9 in 2019, my favorite flight of all time or ICN-SFO on B747-400 in 2016
AS: SJC-SEA
SQ: SFO-SIN
U2: AMS-FCO
KE: IAD-ICN, was about to but cancelled, trying for SFO-ICN next year in 2023
OZ: ICN-SFO, was about to but cancelled, going to merged with KE
B6: SMF-BOS
CO: SMF-IAH, defunct
BR: SFO-TPE
JL: SFO-HND or JFK-HND, cancelled before flight, probably rebooked on KE from IAD-ICN and still got cancelled
DL: IAD-ICN, a codeshare agreement with KE but still counts, cancelled as well as a codeshare, trying next year on SFO-ICN
CX: HKG-SFO

ICN-SFO is longer than SFO-AMS. Also, a codeshare definitely doesn't count (plus it sounds like your flight was cancelled anyway?)

SQ SIN-EWR
LH FRA-KUL
NH FRA-HND
LX ZRH-HKG
EW JFK-DUS (op by SN)
TK DAC-ISL
BA LHR-JFK
D7 KUL-NRT
S7 OMS-HAJ
FR NUE-FNC
MS FRA-CAI
B2 MSQ-TLV
AB KEF-DUS

Will stop here as all remaining will be shorter than 2000km and there are too many left.

SRQKEF wrote:

0hAerqplane wrote:

UA: SFO-AMS on B787-9 in 2019, my favorite flight of all time or ICN-SFO on B747-400 in 2016
AS: SJC-SEA
SQ: SFO-SIN
U2: AMS-FCO
KE: IAD-ICN, was about to but cancelled, trying for SFO-ICN next year in 2023
OZ: ICN-SFO, was about to but cancelled, going to merged with KE
B6: SMF-BOS
CO: SMF-IAH, defunct
BR: SFO-TPE
JL: SFO-HND or JFK-HND, cancelled before flight, probably rebooked on KE from IAD-ICN and still got cancelled
DL: IAD-ICN, a codeshare agreement with KE but still counts, cancelled as well as a codeshare, trying next year on SFO-ICN
CX: HKG-SFO

ICN-SFO is longer than SFO-AMS. Also, a codeshare definitely doesn't count (plus it sounds like your flight was cancelled anyway?)

Probably there was refunds on DL and ICN-SFO was my 747-400 longest flight, used that in 2017 to retire the plane. I took that flight in 2016.

NW: JFK-NRT
UA and AA: JFK-NRT and back
CO: NRT-EWR
DL: SEA-JFK
CI: ANC-TPE and back (flight originated from JFK and landed in ANC for refueling)
WN: ATL-MCO
F9: MCO-ATL

UA: SFO-SYD
NW: MEM-LAX
DL: DEN-ATL
AA: DEN-DFW
WN: IAD-DEN
CO: IAH-CDG
LH: JNB-FRA
EL: TLV-JNB
CX: HKG-DUB
QF: SYD-LAX
JQ: SYD-CNS
TW: STL-SLC
F9: IAH-DEN (technically hasn't happened yet, it's in a few hours)

Norwegian: LAX-BCN (5235 nm)
Ryanair: NRN-TFS (1744 nm)
Transavia: AMS-LPA (1717 nm)
Condor: CGN-LPA (1713 nm)
Air Holland: AMS-FAO (1063 nm)
Vueling: AMS-AGP (1016 nm)
EasyJet: LIS-AMS (997 nm)
SAS operated by Blue1: AMS-ARN (623 nm)
Wizzair: BUD-EIN (593 nm)
KLM Cityhopper: AMS-VCE (506 nm)

Longest for each airline in descending order:

UA: ORD - HKG - 7,794mi/12,543km, 747-400
SQ: SFO - HKG - 6,927mi/11,148km, 747-400
MH: LHR - KUL - 6,592mi/10,610km, A380
LH: SIN - FRA - 6,389mi/10,282km, A340-300
BR: SEA - TPE - 6,069mi/9,767km, 747-400/777-300ER
KL: SFO - AMS - 5,473mi/8,808km, 787-9
BA: LAX - LHR - 5,456mi/8,781km, A380/777-300ER/747-400
TK: IST - SIN - 5,393mi/8,679km, A330-300
DL: AMS - SEA - 4,886mi/7,863km, A330-300
AA: LHR - MIA - 4,425mi/7,121km, 777-300ER
QR: DOH - KUL - 3,673mi/5,911km, 777-300ER/A340-600
EK: GLA - DXB - 3,633mi/5,846km, 777-300ER
B6: JFK - SFO - 2,586mi/4,162km, A321
TR: SIN - HKG - 1,587mi2,554km, A320
U2: LGW - PVK - 1,320mi/2,124km, A320NEO
LS: SPU - EDI - 1,221mi/1,965km, 737-800
FR: EDI - KRK - 1,041mi/1,675km, 737-800
AS: LAS - SEA - 867mi/1,395km, A320
SA: JNB - CPT - 790mi/1,271km, 737-200
US: BDL - CLT - 644mi/1,036km, 737-400
SK: LHR - CPH - 610mi/982km, 737-500
TG: PEN - BKK - 577mi/929km, A320
AF: EDI - CDG - 541mi/870km, A319
AK: SIN - PEN - 373mi/600km, A320
BE: LCY - EDI - 338mi/544km, DHC8-Q400
FY: PEN - SZB - 173mi/278km, ATR-72
LM: EDI - IOM - 138mi/222km, SAAB 340

CX: LHR - HKG rtn (B77W)
O8: LGW - HKG (B744)
BA: LHR - HKG rtn (A380)
IB: MAD - MIA rtn (A330/ A350)
AA: DFW - LHR (B77W)
QR: DOH - HKT rtn (B788)
QF: LHR - SIN rtn (A380)
3K: SIN - DPS rtn (A320)
DI: LGW - MCO (B788)
AF: CDG - MIA rtn (B77W)
KL: AMS - ORD (B77E)
I2: LGW - MAD (A320)
DL: ATL - LHR (B764)

AA: SYD-LAX (B77W)
UA: ORD-FLL (??? Was pre 9/11 and think a B727)
DL: ATL-CUN (??? must've been a B767 too long ago to remember)
WN: MDW-MCO (??? - maybe a B737 not sure about B738)
JQ: SYD-HNL (B788)
QF: SYD-DFW (A388 and next month B789)
NZ: SYD-AKL (B772)
EK: CHC-SYD (A388)

A few I forgot and just booked:
UA A319 (IAH-SFO)
VS 10 A350-1000 (JFK-LHR) coming in May RT

Off the top of my head:

AA: DEN-MIA (738)
BA: LHR-DEN (772)
BD: BHD-LHR (320)
CM: MIA-PTY (39M)
CO: IAH-LGW (DC10)
DL: FCO-JFK (333)
EI: LHR-DUB (321)
F9: CUN-DEN (320N)
HP: ABQ-PHX (733?)
NW: LGW-MSP (DC10)
NZ: SFO-AKL (744)
U2: EDI-LGW (319)
UA: OGG-LAX (763)
WN: BOS-DEN (73G & 738)
Y4: GDL-DEN (32N)

Air France: BOS-CDG 744
AirTran: ATL-MKE 717
Alaska: SEA-ORD 739
Alitalia: FCO-CDG A321
Allegiant: CLE-CHS (and that’s about as far as I would ever fly on Allegiant A319
American: GRU-DFW 77W
Austrian: VIE-ORD 763
Azul: CWB-GRU E175
Delta: ATL-SVO 764
Gol: BSB-CWB 738
GermanWings: CGN-CDG A319
Frontier: MCO-CLE (I would fly no further on Frontier) A321
HapagLloyd (remember them??): CGN-VCE 738
jetBlue: ORD-BOS E175
Icelandair: KEF-ORD 752
KLM: ATL-AMS A332
LATAM: CWB-GIG A320
LIAT: DOM-BGI Dash 8
Lufthansa: CLT-MUC A343
Malev: AMS-BUD 738
SkyEurope: TSF-VIE 738
Southwest: MDW-BOS 73W
United: CLE-SFO 738

Top Ten are
MH A380 KUL-LHR
KE 747-800 ICN-ATL
UA 747-400 FRA-SFO
BA A380/ 747-400 LHR-LAX
EY A340-500 NRT-AUH
CZ A380 AMS-PEK
SQ A380 FRA-JFK (And Back)
DL 747-400 DTW-CDG
LH 747-800 IAD-FRA
AF A380 CDG-JFK

BWIAirport wrote:

For me:
(...)
Aer Lingus: DUB-PHL (EI115) on the 757-200 (EI-LBT), 3,268nm in 7:55
Air France: CDG-IAD (AF26) on the 777-300ER (F-GZNC), 3,855nm in 8:35
British Airways: LHR-IAD (BA217) on the A380 (G-XLEB), 3,671nm in 8:25

Are you sure about the distances in nautical miles?

MartijnNL wrote:

BWIAirport wrote:

For me:
(...)
Aer Lingus: DUB-PHL (EI115) on the 757-200 (EI-LBT), 3,268nm in 7:55
Air France: CDG-IAD (AF26) on the 777-300ER (F-GZNC), 3,855nm in 8:35
British Airways: LHR-IAD (BA217) on the A380 (G-XLEB), 3,671nm in 8:25

Are you sure about the distances in nautical miles?

They just came from my.flightradar24.com, didn't fact check too much

Qantas: SYD-DFW (8578 mi)
United: LAX-MEL (7921 mi)
Singapore Airlines: MAN-SIN (6810 mi)
British Airways: MRU-LGW (6045 mi)
JAL: BNE-NRT (4422 mi)
Cathay Pacific: BNE-HKG (4306 mi)
Kenya Airways: LHR-NBO (4243 mi)
American: MAN-ORD (3826 mi)
Emirates: SIN-BNE (3816 mi - flight was DXB-SIN-BNE)
Etihad: SIN-BNE (3816 mi - flight was AUH-SIN-BNE)
Air Canada: YYZ-LHR (3556 mi)
Virgin Atlantic: JFK-LHR (3451 mi)
Continental: MAN-EWR (3354 mi)
Air2000/First Choice Airlines: MAN-BJL (2868 mi)
JMC Air/Thomas Cook Airlines: MAN-BJL (2868 mi)
Hawaiian: HNL-LAS (2762 mi)
Fiji Airways: SYD-NAN (1970 mi)
Airtours International: MAN-TFS (1893 mi)
Virgin Blue/Pacific Blue/Virgin Australia: BNE-NAN (1686 mi)
Monarch: BHX-TFS (1849 mi)
Jetstar: BNE-CHC (1552 mi)
European Aviation: MAN-VOL (1533 mi)
Sabre Airways: MAN-CTA (1376 mi)
Jet2: MAN-FCO (1044 mi)
Avianca: GUA-MIA (1017 mi)
bmibaby: EMA-PSA (830 mi)
Ryanair: DUB-SXF (828 mi)
Lufthansa: MAN-MUC (704 mi)
Delta: MIA-ATL (594 mi)
KLM: AMS-BGO (553 mi)
Flybe: SEN-DUB (320 mi)
America West: SAN-PHX (304 mi)
US Air/US Airways: LGA-ORF (296 mi)
TWA: JFK-ORF (290 mi)
JetBlue: PHL-BOS (280 mi)
Air New Zealand: CHC-DUD (204 mi)
Brindabella Airlines: CFS-BNE (202 mi)
Blue Islands: JER-LCY (187 mi)
British Midland/bmi: LHR-MAN (151 mi)
IslandAir: HNL-LIH (102 mi)

From my top 10 airlines:

#1 QF: LAX-MEL (B789)
#2 LH: PVG-FRA (A343)
#3 TK: NRT-IST (B77W)
#4 CA: PEK-SYD (A333)
#5 NH: LAX-NRT (B77W)
#6 DJ/VA: DRW-BNE (B738)
#7 AC: YVR-NRT (B789)
#8 EK: DXB-LAX (B77L)
#9 MU: CTU-WUX (A320)
#10 JL: HND-FUK (A359)

0hAerqplane wrote:

DL: IAD-ICN, a codeshare agreement with KE but still counts

No, it doesn't count. By your theory, my 2nd longest flight ever could also be American Airlines, Alaska Airlines and WestJet LAX-MEL. Just no.

0hAerqplane wrote:

KE: IAD-ICN, was about to but cancelled, trying for SFO-ICN next year in 2023
OZ: ICN-SFO, was about to but cancelled, going to merged with KE
JL: SFO-HND or JFK-HND, cancelled before flight, probably rebooked on KE from IAD-ICN and still got cancelled
DL: IAD-ICN, a codeshare agreement with KE but still counts, cancelled as well as a codeshare, trying next year on SFO-ICN

Aside from the fact that a codeshare definitely doesn't count, those cancelled flights definitely don't count, either. I don't know how you can say the longest flight you flew on an airline was the flight you didn't fly.

Aer Lingus - LHR-DUB 737
Air New Zealand - WLG-AKL 737
Alaska Airlines - PDX-SEA 727
Alitalia - LHR-FCO A320
American Airlines - PDX-ORD 727
Austrian Airlines - VIE-LHR A320
British Airways - ORD-LHR 747
BA City Flyer - EDI-LCY E190
British Midland - EDI-LHR DC9
British Midland Regional - LHR-MME E145
Brussels Airlines - LHR-BRU A319
Eastern Airlines - SEA-PDX A300
Edelweiss Air - ZRH-LHR A320
Emirates - SYD-BKK 777
Finnair - LHR-HEL A319
FlyBe - LHR-EDI DHC8
Germanwings - LHR-CGN A319
Helvetic Airways - ZHR-LHR E190
HOP - CDG-LHR E170
Iberia - MAD-LHR A340
Icelandair - LHR-KEF 757
Jetstar - AKL-CHC A320
KLM - CDG-AMS 737
KLM City Hopper - AMS-LHR F70
Latam - MAD-FRA 787
Lufthansa - LHR-MUC A319
Lufthansa Cityline - MUC-NUE CRJ900
Olympic Airways - LHR-ATH A300
Pan Am - LHR-SFO 747
Qantas - LHR-PER 787
Qantaslink - ASP-PER 717
Qatar Airways - VIE-LHR A320
SAS - LHR-STO 737
Swiss - LHR-ZRH A320
TAP - LHR-LIS A319
United Airlines - SFO-PDX 727
United Express (NPA) - SEA-PDX J31

AC: YYZ-TLV
LY: YYZ-TLV
KL: YYZ-AMS
WS: YVR-YYZ
BA: LHR-YYZ
IZ: YYZ-ETH
TS: YYZ-POP
5G: YYZ-AUA
JL: ORD-HND
AA: YYZ-ORD
SWISS: TLV-ZRH
DL: YYZ-JFK
Air Dolomiti: ZRH-MUC
Croatia Airlines: ZAG-VIE
OZ: VIE-TLV

My top 5 by length per airline :

OR AMS-CUR 788
LX ZRH-YUL 333
SQ AMS-EWR 744
EK ZRH-DXB 77W
HV AMS-RHO 738