Here's something I'd like to see Frontier improve on their website: Processing of multi-segment trips. This is a big deal to me as I do it all the time for work and fairly often for leisure.

Examples: MKE-LGA out and EWR-MKE back, MKE-CMH out and MKE-DAY back, MKE-OMA out and MCI-MKE back. MKE-RDU out and DCA-MKE back. All four of those are real examples from my own travels. This works well to visit multiple clients on a single trip, or find better flight times or fares. With the last CMH-MKE flight at 4:30pm, if my client visit might run long I come home on the 9:00pm DAY-MKE flight.

On the Midwest site you click once on the main page to get to the multi-segment page. That gives you virtually all the functions you have on a conventional booking, only you can have multiple different segments.

On the Frontier site:

--It could be easier to find. Nothing tells you on the front page how to get to multi-segment trips. You have to try "more search options", which takes to you to a different screen where "multiple cities" is an option to click on.

--The results you receive do not show prices until you select flghts and move on. Midwest shows the per-segment cost on each possible flight for each leg right up front.

--There's no ability to choose Economy, Classic, or Classic Plus. You just get Economy.

--There's no way to get Stretch seating.

--It insists on automatically doing car shopping for your trip, which can take time to load.

--Seat maps are only available once you've gone through all the steps (including keying in all your information) right before the Purchase step.

I am sure they have plenty going on, but them multiple-city search option is a big step backwards from the Midwest site.