I was hoping to compile an accurate list of flight numbers for US and Canadian regional carriers for work. For example, all Acey flights operating for Delta are XXXX series, all Skywest flights operating for USAirways are XXXX series, etc. I can't seem to find a comprehensive list anywhere, so where better to ask? Thanks!

PDT flights for US Airways are in the low 4XXX series
Also, Mesa op. for US Airways are seemingly between 2500-2800.
GoJet for DL is usually in the 6XXX series.

Hope this helps.  

For Delta:

30-32XX - Comair (may be reallocated now that Comair is no more)
33-36XX - Pinnacle (fenced XJ aircraft)
37-43XX - Pinnacle
44-48XX - SkyWest
49-55XX - ExpressJet
56-58XX - Compass
59-60XX - Shuttle America
61XX - Chautauqua
62XX - GoJets

[Edited 2012-10-26 05:40:44]

Don't forget to add 7XXX to the list of Shuttle flights as well. Only know this because I flew on a flight from RDU-LGA a few weeks back and it was DL7307 or something like that.

Also: 77XX/78XX - Skywest (appear to be flights where SKW has bid on EAS flying outside of the DCI umbrella)

US31XX-32XX Republic operated 175s
US33XX series Republic operated 170s.

At AA, Chautauqua flies flights with 50xx flight numbers and Eagle flies basically anything from 27xx all the way up through 42xx or 43xx I think.

Quoting XPJets (Reply 4): Also: 77XX/78XX - Skywest (appear to be flights where SKW has bid on EAS flying outside of the DCI umbrella)

Correction: appears on all flights that are at-risk, only some of which are EAS.

QX flights are 2XXX and above, IIRC.....

US Flights 3550-4099 are Air Wisconsin.
4100 and up is Piedmont

Any US Airways 4 digit flight number beginning with 2 such as 2487 is operated by PSA Airlines, either a CRJ-200 or CRJ-701.

Quoting XPJets (Reply 2): 44-48XX - SkyWest 49-55XX - ExpressJet

I believe EV starts at 4850. We have an ATW-ATL flight that sometimes uses 4899.

sCO Expressjet
3255-3274
4085-4714
5660-5684
5785-5809
5900-6189

sUA Transstates
3330-3434
5022-5037

sUA Shuttle America
3440-3584

sCO CommutAir
3585-3604
4770-4859
500-5021

sUA Go Jet
3605-3714

sUA Mesa
3720-3724

sUA Expressjet
3805-3854
5810-5899
5685-5774

sCO Republic
3855-3904
4869-4937

sUA Silver
3975-4084

sCO Chautauqua
4715-4769
4975-4999

sUA Skywest
4965-4974
5156-5269
5290-5659
6190-6539

sUA Cape Air
5038-5082
5085-5122

Quoting highflyer9790 (Reply 10): Any US Airways 4 digit flight number beginning with 2 such as 2487 is operated by PSA Airlines, either a CRJ-200 or CRJ-701.

Not all of them.

For US Airways Express:

2200-2599 is PSA. Furthermore, the -700s usually operate the 22XX flights.
2600-2849 is Mesa
2850-2999 is SkyWest
3000-3099 is Chautauqua
3100-3499 is Republic
3500-3550 is Trans States
3551-4099 is Air Wisconsin, although I really don't recall hearing very many of them in the 4000 range
4100-4649 is Piedmont

Air Canada Express:

7350-7499 - Air Georgian
7500-7599 - Sky Regional
7615-7649 - EVAS
7650-8999 - Jazz

Quoting FlyDeltaJets (Reply 12): sCO Expressjet 3255-3274 4085-4714 5660-5684 5785-5809 5900-6189 sUA Transstates 3330-3434 5022-5037 sUA Shuttle America 3440-3584 sCO CommutAir 3585-3604 4770-4859 500-5021 sUA Go Jet 3605-3714 sUA Mesa 3720-3724 sUA Expressjet 3805-3854 5810-5899 5685-5774 sCO Republic 3855-3904 4869-4937 sUA Silver 3975-4084 sCO Chautauqua 4715-4769 4975-4999 sUA Skywest 4965-4974 5156-5269 5290-5659 6190-6539 sUA Cape Air 5038-5082 5085-5122

Stop it. You're making my head spin with all these numbers.   

UA seriously needs to realign their UAX flight numbers.