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Cheap flights from St. Louis to Boise (STL - BOI) from $178

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — BOI
Apr 24 — May 11
From?
To?
Wed 4/24
Wed 5/1
1 adult, Economy
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The best prices from Lambert-St Louis to Boise Air Term. Gowen Fld are usually found in February or January, booked 15 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from St. Louis to Boise

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 19, 2024.

Popular in

December

Cheapest in

February

Round-trip from

$311

One-way from

$178
High demand for flights, 19% potential price rise
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Best time to find cheap flights, 20% potential price drop
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From Lambert-St Louis to Boise Air Term. Gowen Fld
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One-way flight from Lambert-St Louis to Boise Air Term. Gowen Fld
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What is the cheapest day to fly round-trip from St. Louis to Boise?

Users have found that flying from St. Louis to Boise on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Find a great deal and save up to 227% by booking at least 16 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Boise within the next two weeks, with the cheapest ticket starting at $355.

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

Flights from St. Louis to Boise lean towards being more expensive in December. Prices are generally better when you fly from St. Louis to Boise in February, with the cheapest ticket starting at $278.

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

When flying from St. Louis to Boise, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 14% versus a flight in the afternoon.

Cheap American Airlines flights from St. Louis to Boise

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Boise. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Take a peek at the cheapest American Airlines flights we've detected traveling from St. Louis to Boise. Be sure to come back soon if the deals available don't appeal to you at this time.
Mon 7/15:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Tue 7/912:59 amBOI - STL
1 stop7h 30mAmerican Airlines
Deal found 4/18$294
Wed 5/85:21 amSTL - BOI
1 stop8h 24mAmerican Airlines
Fri 5/105:15 pmBOI - STL
1 stop5h 41mAmerican Airlines
Deal found 4/18$362
Mon 7/15:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Wed 7/106:30 amBOI - STL
1 stop9h 49mAmerican Airlines
Deal found 4/18$370
Sat 5/186:18 pmSTL - BOI
1 stop6h 14mAmerican Airlines
Sat 5/256:30 amBOI - STL
1 stop6h 13mAmerican Airlines
Deal found 4/18$391
Thu 7/47:31 amSTL - BOI
1 stop10h 03mAmerican Airlines
Sun 7/712:59 amBOI - STL
1 stop7h 30mAmerican Airlines
Deal found 4/19$401
Thu 7/186:09 pmSTL - BOI
1 stop6h 25mAmerican Airlines
Sat 7/2712:59 amBOI - STL
1 stop7h 30mAmerican Airlines
Deal found 4/18$406
Sat 5/186:18 pmSTL - BOI
1 stop6h 14mAmerican Airlines
Sat 5/256:30 amBOI - STL
2 stops15h 29mAmerican Airlines
Deal found 4/18$421
Mon 7/112:44 pmSTL - BOI
2 stops11h 32mAmerican Airlines
Tue 7/912:59 amBOI - STL
1 stop7h 30mAmerican Airlines
Deal found 4/18$508
Sun 5/198:00 amSTL - BOI
1 stop6h 15mAmerican Airlines
Sun 5/266:00 amBOI - STL
1 stop7h 13mAmerican Airlines
Deal found 4/19$616

Cheap Delta flights from St. Louis to Boise

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Boise. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from St. Louis to Boise. Deals are refreshing constantly so come back soon for more options.
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:23 amBOI - STL
1 stop7h 52mDelta
Deal found 4/17$296
Fri 7/196:15 amSTL - BOI
1 stop5h 45mDelta
Tue 7/235:55 pmBOI - STL
1 stop5h 44mDelta
Deal found 4/17$325
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:52 pmBOI - STL
2 stops19h 23mDelta
Deal found 4/17$333
Fri 9/65:40 pmSTL - BOI
1 stop6h 49mDelta
Thu 9/125:59 pmBOI - STL
1 stop5h 31mDelta
Deal found 4/18$345
Fri 7/195:59 pmSTL - BOI
1 stop6h 54mDelta
Mon 7/225:55 pmBOI - STL
1 stop5h 44mDelta
Deal found 4/17$356
Wed 7/176:15 amSTL - BOI
1 stop5h 45mDelta
Wed 7/247:30 amBOI - STL
2 stops9h 05mDelta
Deal found 4/18$363
Wed 5/810:20 amSTL - BOI
2 stops9h 54mDelta
Sat 5/111:31 pmBOI - STL
1 stop9h 09mDelta
Deal found 4/18$371
Wed 5/810:20 amSTL - BOI
2 stops9h 54mDelta
Sat 5/115:52 pmBOI - STL
2 stops19h 23mDelta
Deal found 4/17$373
Fri 7/196:15 amSTL - BOI
1 stop5h 45mDelta
Tue 7/233:10 pmBOI - STL
2 stops8h 29mDelta
Deal found 4/17$389

Cheap St. Louis to Boise flights in April & May 2024

Find cheap flight options from St. Louis to Boise specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,138,949 searches. Prices were last updated on April 19, 2024.
These are some of the best deals we've found on flights to Boise in 2024 at this time. Check back soon for alternative fares.
Wed 5/811:36 amSTL - BOI
1 stop9h 20mSpirit Airlines
Fri 5/109:15 pmBOI - STL
3 stops18h 10mSpirit Airlines
Deal found 4/18$224
Wed 5/811:36 amSTL - BOI
1 stop9h 20mSpirit Airlines
Fri 5/1010:54 amBOI - STL
2 stops22h 34mSpirit Airlines
Deal found 4/18$257
Mon 4/225:02 pmSTL - BOI
1 stop27h 55mSpirit Airlines
Tue 4/309:15 pmBOI - STL
1 stop12h 28mSpirit Airlines
Deal found 4/18$291
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:23 amBOI - STL
1 stop7h 52mDelta
Deal found 4/17$296
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:52 pmBOI - STL
2 stops19h 23mDelta
Deal found 4/17$333
Wed 5/87:00 amSTL - BOI
1 stop8h 05mAlaska Airlines
Sat 5/113:00 pmBOI - STL
1 stop7h 59mAlaska Airlines
Deal found 4/18$344
Wed 5/85:21 amSTL - BOI
1 stop8h 24mAmerican Airlines
Fri 5/105:15 pmBOI - STL
1 stop5h 41mAmerican Airlines
Deal found 4/18$362
Sat 5/1811:39 amSTL - BOI
3 stops24h 46mMultiple Airlines
Sat 5/254:54 pmBOI - STL
3 stops23h 35mMultiple Airlines
Deal found 4/18$366
Wed 5/810:20 amSTL - BOI
2 stops9h 54mDelta
Sat 5/111:31 pmBOI - STL
1 stop9h 09mDelta
Deal found 4/18$371

St. Louis to Boise 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Boise in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
These are some of the best deals we've found on flights to Boise in 2024 at this time. Check back soon for alternative fares.
Wed 5/811:36 amSTL - BOI
1 stop9h 20mSpirit Airlines
Fri 5/109:15 pmBOI - STL
3 stops18h 10mSpirit Airlines
Deal found 4/18$224
Wed 5/811:36 amSTL - BOI
1 stop9h 20mSpirit Airlines
Fri 5/1010:54 amBOI - STL
2 stops22h 34mSpirit Airlines
Deal found 4/18$257
Mon 4/225:02 pmSTL - BOI
1 stop27h 55mSpirit Airlines
Tue 4/309:15 pmBOI - STL
1 stop12h 28mSpirit Airlines
Deal found 4/18$291
Mon 7/15:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Tue 7/912:59 amBOI - STL
1 stop7h 30mAmerican Airlines
Deal found 4/18$294
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:23 amBOI - STL
1 stop7h 52mDelta
Deal found 4/17$296
Fri 7/196:15 amSTL - BOI
1 stop5h 45mDelta
Tue 7/235:55 pmBOI - STL
1 stop5h 44mDelta
Deal found 4/17$325
Thu 9/196:18 pmSTL - BOI
1 stop28h 51mSpirit Airlines
Sun 9/2210:59 pmBOI - STL
1 stop14h 13mSpirit Airlines
Deal found 4/17$328
Wed 5/85:30 pmSTL - BOI
1 stop7h 44mDelta
Sat 5/115:52 pmBOI - STL
2 stops19h 23mDelta
Deal found 4/17$333
Wed 5/87:00 amSTL - BOI
1 stop8h 05mAlaska Airlines
Sat 5/113:00 pmBOI - STL
1 stop7h 59mAlaska Airlines
Deal found 4/18$344

One-way flights to Boise from St. Louis

Search for one-way flight options from St. Louis to Boise. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Users traveling one-way from St. Louis to Boise can select one of these great deals. Those needing a return flight from St. Louis to Boise can use the search form above.
Sun 5/268:00 amSTL - BOI
1 stop6h 15mAmerican Airlines
Deal found 4/18$178
Sat 7/611:34 amSTL - BOI
2 stops24h 49mMultiple Airlines
Deal found 4/18$188
Sun 5/266:20 pmSTL - BOI
2 stops27h 05mMultiple Airlines
Deal found 4/18$276
Sun 5/267:30 pmSTL - BOI
3 stops22h 00mSpirit Airlines
Deal found 4/18$304
Sat 7/611:34 amSTL - BOI
3 stops24h 49mMultiple Airlines
Deal found 4/18$407

Find flights from St. Louis to Boise within your budget

Customize your flight search to find flights from St. Louis to Boise that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$224 - $647

Route

Depart

Return

Price

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/8

1 stop9h 20m

Boise Air Term. Gowen Fld

Fri 5/10

3 stops18h 10m

$224

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/8

1 stop9h 20m

Boise Air Term. Gowen Fld

Fri 5/10

2 stops22h 34m

$257

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Mon 7/1

1 stop6h 33m

Boise Air Term. Gowen Fld

Tue 7/9

1 stop7h 30m

$294

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/8

1 stop7h 44m

Boise Air Term. Gowen Fld

Sat 5/11

1 stop7h 52m

$296

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Fri 7/19

1 stop5h 45m

Boise Air Term. Gowen Fld

Tue 7/23

1 stop5h 44m

$325

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Thu 9/19

1 stop28h 51m

Boise Air Term. Gowen Fld

Sun 9/22

1 stop14h 13m

$328

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/8

1 stop8h 05m

Boise Air Term. Gowen Fld

Sat 5/11

1 stop7h 59m

$344

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Sat 5/18

3 stops24h 46m

Boise Air Term. Gowen Fld

Sat 5/25

3 stops23h 35m

$366

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Sun 5/19

1 stop10h 27m

Boise Air Term. Gowen Fld

Sun 5/26

2 stops13h 42m

$647

Flights are sorted by cheapest first

Deals found on 4/18

When is the best time to book a flight from St. Louis to Boise?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Boise. Price data was last updated on January 28, 2024.
The price you pay for your flight from St. Louis to Boise may vary depending on when you book. For the best chance of a lower fare, look to book 15 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from St. Louis to Boise?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Boise. Price data was last updated on April 14, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Boise flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Boise by month

Plan your trip from St. Louis to Boise by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Boise is currently $271 while a round-trip flight costs $342. Price data was last updated on April 14, 2024.

Currently, December is the cheapest month in which you can book a flight from St. Louis to Boise (average of $311). Flying from St. Louis to Boise in July is currently the most expensive (average of $438). 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.

January

$316

February

$337

March

$393

April

$357

May

$410

June

$436

July

$438

August

$383

September

$366

October

$356

November

$316

December

$311

Temperature and rainfall in Boise by month

Plan your trip to Boise by taking into account the average temperature and rainfall totals by month.

BOI

Temperature

30.2 - 75.2 °F

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boise. Reviews last updated April 19, 2024.
See what other customers who have flown with American Airlines, Delta and Spirit Airlines from St. Louis to Boise have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,109 reviews
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
11,094 reviews
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,325 reviews
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,955 reviews
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Spirit Airlines
6.4
Okay
8,777 reviews
Alaska Airlines
8.1
Very good
9,109 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from St. Louis to Boise for under $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Boise for under $300. The cheapest flight booked recently is on Spirit Airlines for just $224, but on average you can expect to pay $343.

  • What are the cheapest airlines flying from St. Louis to Boise round-trip?

    According to our current data, Spirit Airlines ($224), American Airlines ($294), and Delta ($296) offers the cheapest pricing from St. Louis to Boise. Spirit Airlines is priced at 52% 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 Boise?

    Before booking your flight from St. Louis to Boise check out the most popular airlines for this route: American Airlines, Alaska Airlines or Delta.

  • What does STL to BOI mean?

    Great question - STL to BOI just means Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from St. Louis to Boise that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Boise flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Boise with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Boise flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Boise that include hotel bookings?

    Yes. In addition to deals on St. Louis to Boise flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Boise?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Boise.

  • Can I find deals for business class flights from St. Louis to Boise?

    Yes. Cheapflights offers flight deals from St. Louis to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Boise that allow pets onboard?

    Many airlines flying from St. Louis to Boise offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Boise?

    Yes, you can often find last-minute deals on St. Louis to Boise flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Boise flight deals updated?

    The St. Louis to Boise flight deals you see on this page were last updated on 4/18.

See more FAQs

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Alternative routes for St. Louis to Boise
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from St. Louis to Boise

Discover the top 5 airlines that operate flights from St. Louis to Boise. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$198Average$269FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapest$285Average$396FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest$297Average$467FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$305Average$528FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$316Average$513FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from St. Louis to Boise by cabin class

Find flights from St. Louis to Boise, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Boise?

Deals for St. Louis to Boise flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Boise?

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Boise by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St. Louis to Boise with no change fees?

Need flexible booking options for your flight to Boise from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Boise become cheaper?

Of course! You can now track prices for flights from St. Louis to Boise and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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