Cheap flights from St. Louis (STL) to Idaho

STL — BOI
Oct 3 — Oct 101

How far in advance should I book a flight from St. Louis to Idaho?

Users have found that booking a flight from St. Louis to Idaho at least 37 days early can save you up to 33% on average compared to booking a flight this week. If booking 37 days before your flight isn’t an option for you, users have found flights from St. Louis to Idaho for as little as $548 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $567 for flights departing within the next 3 days.

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

Flights from St. Louis to Idaho lean towards being more expensive in June. Prices are generally better when you fly from St. Louis to Idaho in October, with the cheapest ticket starting at $254.

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

When flying from St. Louis to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from St. Louis to Idaho in September, October 2022

The best prices found for STL to Idaho flights for September, October
Oct 17 - Oct 19
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

14h 40m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

6h 54m
$194

Multiple Airlines

Pick Dates

Deal found 27/9/22

Oct 31 - Nov 4
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

14h 40m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

13h 52m
$198

Multiple Airlines

Pick Dates

Deal found 26/9/22

Oct 14 - Oct 18
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

13h 12m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

23h 08m
$208

Multiple Airlines

Pick Dates

Deal found 27/9/22

St. Louis to Idaho 2022 flight deals

Cheap flights to Idaho from St. Louis found for this year
Oct 17 - Oct 19
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

14h 40m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

6h 54m
$194

Multiple Airlines

Pick Dates

Deal found 27/9/22

Oct 31 - Nov 4
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

14h 40m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

13h 52m
$198

Multiple Airlines

Pick Dates

Deal found 26/9/22

Oct 14 - Oct 18
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

13h 12m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

23h 08m
$208

Multiple Airlines

Pick Dates

Deal found 27/9/22

Cheap Spirit Airlines flights from St. Louis to Idaho

Nov 18 - Nov 20
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

19h 06m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

27h 02m
$415

Spirit Airlines

Pick Dates

Deal found 26/9/22

Dec 23 - Dec 29
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

19h 15m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

26h 55m
$682

Spirit Airlines

Pick Dates

Deal found 27/9/22

Cheap Delta flights from St. Louis to Idaho

Oct 18 - Oct 25
STL

Lambert-St Louis

GEG

Spokane

1 stop

7h 08m
GEG

Spokane

STL

Lambert-St Louis

1 stop

7h 59m
$336

Delta

Pick Dates

Deal found 26/9/22

Oct 18 - Oct 25
STL

Lambert-St Louis

GEG

Spokane

1 stop

7h 56m
GEG

Spokane

STL

Lambert-St Louis

2 stops

11h 44m
$345

Delta

Pick Dates

Deal found 26/9/22

Nov 2 - Nov 8
STL

Lambert-St Louis

GEG

Spokane

2 stops

12h 56m
GEG

Spokane

STL

Lambert-St Louis

2 stops

11h 46m
$355

Delta

Pick Dates

Deal found 28/9/22

Last minute flights from St. Louis to Idaho

Late deals on return flights to Idaho from St. Louis, departing today and this week
Oct 7 - Oct 10
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

13h 12m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

23h 53m
$267

Multiple Airlines

Pick Dates

Deal found 27/9/22

Oct 3 - Oct 7
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

21h 20m
BOI

Boise Air Term. Gowen Fld

STL

Lambert-St Louis

1 stop

9h 03m
$275

Multiple Airlines

Pick Dates

Deal found 26/9/22

Oct 3 - Oct 7
STL

Lambert-St Louis

GEG

Spokane

2 stops

17h 25m
GEG

Spokane

STL

Lambert-St Louis

1 stop

13h 02m
$321

Multiple Airlines

Pick Dates

Deal found 26/9/22

One-way flights to Idaho from St. Louis

The cheapest one-way flights from St. Louis to Idaho
Oct 27
STL

Lambert-St Louis

GEG

Spokane

1 stop

13h 13m
$87

Multiple Airlines

Pick Dates

Deal found 27/9/22

Oct 25
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

15h 05m
$94

Spirit Airlines

Pick Dates

Deal found 25/9/22

Oct 27
STL

Lambert-St Louis

BOI

Boise Air Term. Gowen Fld

1 stop

15h 05m
$105

Spirit Airlines

Pick Dates

Deal found 27/9/22

Related info for your journey

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

What airport do you fly from for flights from St. Louis to Idaho?

For a flight from St. Louis to Idaho, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

Some of our airline partners flying from Lambert-St Louis to Idaho have new flexible policies in place due to COVID-19. Delta, United Airlines, and American Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Delta with this kind of flexibility.

Can I find flights from St. Louis to Idaho for under $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to Idaho for under $200. The cheapest flight booked recently is on Multiple Airlines for just $194, but on average you can expect to pay $263.

Are there last-minute flights available from St. Louis to Idaho for under $300?

There are currently 20+ open flights from St. Louis to Idaho within the next 7 days for less than $300.

How popular is this St. Louis to Idaho flight route?

Flights from Lambert-St Louis to Idaho have been viewed 18 times in the past calendar month.

What are the cheapest airlines to fly from St. Louis to Idaho one-way?

The cheapest airlines for a one-way flight from St. Louis to Idaho are Spirit Airlines ($94), Frontier ($110), and Delta ($168).

What are the most popular routes from St. Louis to Idaho?

The most popular route from St. Louis to Idaho is Lambert-St Louis - Spokane. You may also consider Lambert-St Louis - Boise Air Term. Gowen Fld or Lambert-St Louis - Idaho Falls Fanning Field.

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

When booking a flight from St. Louis to Idaho, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

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

Looking for the cheapest flight from St. Louis to Idaho? While on average our users pay $706, our data indicates the cheapest price to be $168. The most popular route (Lambert-St Louis - Spokane), is priced around $227.

Destination points for flights from St. Louis to Idaho

Select to see more specific information for flights from St. Louis to all places in Idaho

Top 4 airlines flying from St. Louis to Idaho

The chart below displays the airlines Cheapflights users traveling from St. Louis to Idaho choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
United AirlinesCheapest$200Average$550FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$255Average$548FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
American AirlinesCheapest$267Average$516FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
Alaska AirlinesCheapest$295Average$491FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights

Hourly flight availability from St. Louis to Idaho

See what time of day planes typically take off from St. Louis to Idaho
0%of flight departuresEarly morningMidnight to 6 am
100%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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6 PM