Here is an interesting comparison for you.
I am going to Seattle in June and was researching flights. My first thought was to take WN from BWI. Figured it would be the best deal.
I live in York Pa and MDT (Harrisburg Int'l) is closer, but usually more $$ because it is a smaller airport.
Anyway, I check out WN from BWI to SEA. Then I looked into flying from MDT to SEA. To my surprise, UA from MDT-SEA, connecting in ORD was $230.00 cheaper than WN (for 3 seat)!
So, for my $230.00 savings, what did I get?
1: 1/2 hour to the airport instead of 1 1/2
3: In flight meals
4: Assigned seating, MY choice!
5: opportunity to sample 3 types of a/c instead of 1 (CRJ, 777, 757) vs 737 only
6: Miles of smiles!
It pays to shop. LCC's are not always the LowestCC's !