Cheap flights from St. Louis to Idaho Falls (STL - IDA)

STL — IDA
Dec 14 — Dec 211

What is the cheapest day to fly round-trip from St. Louis to Idaho Falls?

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 38% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Idaho Falls?

Our data shows that February tends to be the cheapest month to fly to Idaho Falls from St. Louis. Users have commonly found prices around $544 for the month, but tickets can be as low as $113. Due to multiple factors, prepare for potentially higher prices in October.

When is the cheapest time to fly from St. Louis to Idaho Falls (STL - IDA)?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Idaho Falls in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

Cheap flights from St. Louis to Idaho Falls in December, January 2022

The best prices found for STL to IDA flights for December, January
Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

25h 04m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

1 stop

21h 12m
$374

United Airlines

Pick Dates

Deal found 12/7

Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

25h 04m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

26h 24m
$378

United Airlines

Pick Dates

Deal found 12/7

Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

2 stops

23h 20m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

26h 24m
$383

United Airlines

Pick Dates

Deal found 12/7

St. Louis to Idaho Falls 2022 flight deals

Cheap flights to Idaho Falls from St. Louis found for this year
Dec 22 - Dec 29
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

7h 42m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

1 stop

18h 11m
$546

United Airlines

Pick Dates

Deal found 12/8

Dec 22 - Dec 29
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

7h 42m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

13h 20m
$626

United Airlines

Pick Dates

Deal found 12/8

Dec 30 - Jan 3
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

14h 54m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

1 stop

26h 11m
$636

United Airlines

Pick Dates

Deal found 12/7

Cheap United Airlines flights from St. Louis to Idaho Falls

Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

25h 04m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

1 stop

21h 12m
$374

United Airlines

Pick Dates

Deal found 12/7

Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

1 stop

25h 04m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

26h 24m
$378

United Airlines

Pick Dates

Deal found 12/7

Jan 10 - Jan 24
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

2 stops

23h 20m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

26h 24m
$383

United Airlines

Pick Dates

Deal found 12/7

Cheap Alaska Airlines flights from St. Louis to Idaho Falls

Dec 30 - Jan 3
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

2 stops

15h 59m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

24h 59m
$1,845

Alaska Airlines

Pick Dates

Deal found 12/7

Dec 22 - Dec 29
STL

Lambert-St Louis

IDA

Idaho Falls Fanning Field

2 stops

14h 20m
IDA

Idaho Falls Fanning Field

STL

Lambert-St Louis

2 stops

24h 16m
$1,912

Alaska Airlines

Pick Dates

Deal found 12/8

Related info for your journey

Useful info, stats and facts about St. Louis to Idaho Falls flights.

Which airlines flying from Lambert-St Louis to Idaho Falls Fanning Field have flexible cancellations due to COVID-19?

Delta, United Airlines, and American Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from St. Louis to Idaho Falls for under $400 on Cheapflights?

Yes, there are multiple flights from St. Louis to Idaho Falls for under $400. The cheapest flight booked recently is on United Airlines for just $374, but on average you can expect to pay $800.

What are the cheapest airlines flying from St. Louis to Idaho Falls round-trip?

United Airlines, at $374, was found to be the cheapest airline from St. Louis to Idaho Falls. An alternate airline flying to your destination would be Alaska Airlines. United Airlines is priced at 31% lower than the current average price of a flight leaving 3 months from now.

What are the most popular airlines that fly from St. Louis to Idaho Falls?

Consider American Airlines, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Idaho Falls.

What are the cheapest flights from St. Louis to Idaho Falls?

Looking at all options, your cheapest flight can be booked for $198. While the most popular route (Lambert-St Louis - Idaho Falls Fanning Field) can be booked for $396 on average our data indicates $834 when flying from St. Louis to Idaho Falls.

Alternative routes for St. Louis to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from St. Louis to Idaho Falls

The chart below displays the airlines Cheapflights users traveling from St. Louis to Idaho Falls choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
United AirlinesCheapest$200Average$562FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$348Average$607FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights