
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $344 (Alaska Airlines) |
One-way from | $230 (American Airlines) |
Popular in | March |
Cheapest in | September |
Average price | $632 |
Fly from
Fly to
Route
Depart
Return
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Mon 12/7
6:15 am-2:26 pm
1 stop7h 11m
Lambert-St Louis
Tue 12/8
3:24 pm-10:39 pm
1 stop8h 15m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Wed 10/28
1:46 pm-11:59 pm
1 stop9h 13m
Lambert-St Louis
Sat 10/31
4:40 pm-10:54 pm
1 stop7h 14m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Wed 10/28
5:00 am-3:38 pm
2 stops9h 38m
Lambert-St Louis
Sat 10/31
1:30 pm-5:22 pm
1 stop4h 52m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Tue 7/14
5:54 pm-11:57 pm
1 stop5h 03m
Lambert-St Louis
Thu 7/16
5:10 am-9:50 am
1 stop5h 40m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Tue 6/23
7:00 am-4:33 pm
1 stop8h 33m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Sat 8/8
5:54 pm-11:47 pm
1 stop4h 53m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Sun 8/9
4:14 pm-11:57 pm
1 stop6h 43m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Tue 6/23
7:00 pm-8:16 am
2 stops12h 16m
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Sat 8/8
4:14 pm-6:15 pm
3 stops49h 01m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Currently, September is the cheapest month in which you can book a flight from Idaho Falls to St. Louis (average of $430). Flying from Idaho Falls to St. Louis in March is currently the most expensive (average of $738). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Boarding
Food
Crew
Entertainment
Overall
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Crew
Entertainment
Overall
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Crew
Entertainment
Overall
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
Boarding
Food
Crew
Entertainment
Overall
Comfort
Reviews
Anonymous,May 2026
SEA - KOA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$185 | Average$558 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$350 | Average$430 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$387 | Average$520 | FlexibilityNo cancel fee | On-time69% |