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

Flights from Boston Logan Intl to Lambert-St Louis have been viewed 40 times in the past calendar month.

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

Cheapflights users have booked flights from Boston to St. Louis round-trip from $283. Other airlines that can offer you cheap pricing are Delta, from $285, and American Airlines, from $287. Spirit Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

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

The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $58. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Boston to St. Louis for a low price.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

Looking at all options, your cheapest flight can be booked for $128. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $137 on average our data indicates $409 when flying from Boston to St. Louis.

What are the most reliable airlines from Boston to St. Louis?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to St. Louis on time: Iberia (100%), Republic Airways (100%), American Airlines (83%).

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

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

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

Saturday flights are found to be more expensive to fly from Boston to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

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

To save up to 68% on this flight, we recommend booking at least 26 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Boston to St. Louis from $521 1-2 weeks out and tickets from $745 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in April. For low rates, August can be a great choice for travel to St. Louis. Flights to St. Louis from Boston in August are about $437 on average during August, but can be found for as low as $224.

What airports do I use to fly from Boston to St. Louis?

If you wish to fly to St. Louis from Boston, then you need to book flights from Boston Logan Intl to Lambert-St Louis. There are 4 flights from Logan Intl (BOS) to Lambert-St Louis (STL) per day to choose from. Flights to St. Louis from Logan Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 2h 50m is how long a nonstop flight from Boston to Lambert-St Louis typically takes.

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

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

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

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

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

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

$58+ Flights from Boston to St. Louis

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from Boston Logan Intl to Lambert-St Louis are usually found in August or September, booked 63 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Boston to St. Louis

Round-trip from	$279 (FlightHub)
One-way from	$58 (FlightHub)
Popular in	April
Cheapest in	August
Average price	$467
Good round-trip deal	$294 or less
Good one-way deal	$181 or less

From Boston Logan Intl to Lambert-St Louis

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One-way flight from Boston Logan Intl to Lambert-St Louis

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Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Boston Logan Intl to Lambert-St Louis.

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Price to beat on a one-way flight from Boston Logan Intl to Lambert-St Louis.

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Find flight deals from Boston to St. Louis

Cheapest flights from Boston to St. Louis
Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Sat 8/29:40 amBOS - STL

1 stop15h 07mMultiple Airlines

Sun 8/105:26 pmSTL - BOS

1 stop25h 08mMultiple Airlines

Deal found 7/19

$279

Wed 8/206:30 amBOS - STL

2 stops28h 10mSpirit Airlines

Thu 8/212:30 pmSTL - BOS

2 stops8h 24mSpirit Airlines

Deal found 7/21

$283

Fri 9/56:00 amBOS - STL

1 stop6h 10mDelta

Sun 9/76:00 amSTL - BOS

1 stop6h 20mDelta

Deal found 7/21

$285

Mon 8/254:10 pmBOS - STL

Nonstop3h 09mAmerican Airlines

Sun 8/316:00 amSTL - BOS

1 stop8h 19mAmerican Airlines

Deal found 7/19

$287

Thu 8/147:10 amBOS - STL

Nonstop2h 55mSouthwest

Mon 8/187:25 pmSTL - BOS

Nonstop2h 35mSouthwest

Deal found 7/21

$297

Tue 9/27:10 amBOS - STL

2 stops8h 09mUnited Airlines

Sat 9/69:17 amSTL - BOS

1 stop6h 26mUnited Airlines

Deal found 7/21

$302

Fri 8/19:40 amBOS - STL

1 stop15h 07mFrontier

Sun 8/35:40 pmSTL - BOS

1 stop13h 55mFrontier

Deal found 7/19

$335

Best flights from Boston to St. Louis
Discover carefully curated flight deals from Boston to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 21, 2025.

Sat 8/29:40 amBOS - STL

1 stop15h 07mMultiple Airlines

Sun 8/105:26 pmSTL - BOS

1 stop25h 08mMultiple Airlines

Deal found 7/19

$279

Wed 8/206:30 amBOS - STL

2 stops28h 10mSpirit Airlines

Thu 8/212:30 pmSTL - BOS

2 stops8h 24mSpirit Airlines

Deal found 7/21

$283

Fri 9/55:15 amBOS - STL

1 stop5h 17mDelta

Fri 9/55:11 pmSTL - BOS

1 stop7h 10mDelta

Deal found 7/19

$285

Mon 8/254:10 pmBOS - STL

Nonstop3h 09mAmerican Airlines

Sun 8/316:00 amSTL - BOS

1 stop8h 19mAmerican Airlines

Deal found 7/19

$287

Thu 8/147:10 amBOS - STL

Nonstop2h 55mSouthwest

Mon 8/187:25 pmSTL - BOS

Nonstop2h 35mSouthwest

Deal found 7/21

$297

Tue 9/27:10 amBOS - STL

2 stops8h 09mUnited Airlines

Sat 9/69:17 amSTL - BOS

1 stop6h 26mUnited Airlines

Deal found 7/21

$302

Fri 8/19:40 amBOS - STL

1 stop15h 07mFrontier

Sun 8/35:40 pmSTL - BOS

1 stop13h 55mFrontier

Deal found 7/19

$335

Last-minute flights from Boston to St. Louis
Discover last-minute flight deals from Boston to St. Louis. Data last updated July 21, 2025 and is based on user searches.

Sat 7/269:40 amBOS - STL

1 stop15h 07mMultiple Airlines

Sat 8/210:45 amSTL - BOS

1 stop6h 36mMultiple Airlines

Deal found 7/21

$295

Sat 7/269:40 amBOS - STL

1 stop15h 07mFrontier

Sun 7/275:40 pmSTL - BOS

1 stop13h 55mFrontier

Deal found 7/21

$360

Tue 7/2911:00 amBOS - STL

1 stop10h 57mDelta

Sat 8/96:00 amSTL - BOS

1 stop8h 08mDelta

Deal found 7/19

$448

Thu 7/316:10 amBOS - STL

1 stop11h 21mSpirit Airlines

Sat 8/210:45 amSTL - BOS

1 stop11h 18mSpirit Airlines

Deal found 7/20

$286

Fri 8/19:40 amBOS - STL

1 stop15h 07mFrontier

Sun 8/35:40 pmSTL - BOS

1 stop13h 55mFrontier

Deal found 7/20

$333

Sat 8/29:40 amBOS - STL

1 stop15h 07mMultiple Airlines

Sun 8/105:26 pmSTL - BOS

1 stop25h 08mMultiple Airlines

Deal found 7/19

$279

Thu 8/147:10 amBOS - STL

Nonstop2h 55mSouthwest

Mon 8/187:25 pmSTL - BOS

Nonstop2h 35mSouthwest

Deal found 7/21

$297

Wed 8/206:30 amBOS - STL

2 stops28h 10mSpirit Airlines

Thu 8/212:30 pmSTL - BOS

2 stops8h 24mSpirit Airlines

Deal found 7/21

$283

Sat 8/236:09 amBOS - STL

1 stop7h 16mUnited Airlines

Mon 8/258:10 amSTL - BOS

2 stops8h 24mUnited Airlines

Deal found 7/21

$302

Mon 8/254:10 pmBOS - STL

Nonstop3h 09mAmerican Airlines

Sun 8/316:00 amSTL - BOS

1 stop8h 19mAmerican Airlines

Deal found 7/19

$287

One-way flights from Boston to St. Louis
Search for one-way flight options from Boston to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 21, 2025.

Thu 8/216:30 amBOS - STL

1 stop8h 02mSpirit Airlines

Deal found 7/19

$58

Tue 9/169:43 amBOS - STL

1 stop5h 36mUnited Airlines

Deal found 7/21

$109

Sat 10/1112:51 pmBOS - STL

1 stop8h 35mAmerican Airlines

Deal found 7/19

$114

Fri 9/129:59 amBOS - STL

1 stop7h 49mDelta

Deal found 7/21

$126

Mon 10/1310:16 amBOS - STL

2 stops24h 24mMultiple Airlines

Deal found 7/19

$152

Fri 10/109:18 amBOS - STL

1 stop29h 09mFrontier

Deal found 7/19

$156

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 8/2

9:40 am-11:47 pm

1 stop15h 07m

Lambert-St Louis

Sun 8/10

5:26 pm-7:34 pm

1 stop25h 08m

$279

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 8/20

6:30 am-9:40 am

2 stops28h 10m

Lambert-St Louis

Thu 8/21

2:30 pm-11:54 pm

2 stops8h 24m

$283

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 9/5

6:00 am-11:10 am

1 stop6h 10m

Lambert-St Louis

Sun 9/7

6:00 am-1:20 pm

1 stop6h 20m

$285

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 8/25

4:10 pm-6:19 pm

Nonstop3h 09m

Lambert-St Louis

Sun 8/31

6:00 am-3:19 pm

1 stop8h 19m

$287

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 8/14

7:10 am-9:05 am

Nonstop2h 55m

Lambert-St Louis

Mon 8/18

7:25 pm-11:00 pm

Nonstop2h 35m

$297

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 9/2

7:10 am-2:19 pm

2 stops8h 09m

Lambert-St Louis

Sat 9/6

9:17 am-4:43 pm

1 stop6h 26m

$302

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 8/1

9:40 am-11:47 pm

1 stop15h 07m

Lambert-St Louis

Sun 8/3

5:40 pm-8:35 am

1 stop13h 55m

$335

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 8/21

6:30 am-1:32 pm

1 stop8h 02m

$58

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 9/16

8:05 am-12:21 pm

1 stop5h 16m

$109

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 10/11

12:51 pm-8:26 pm

1 stop8h 35m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 14 results

The best insider tips for Boston to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to St. Louis trip

Airports

BOS

Use the FlyLogan App to pre-order food and save time at BOS. Most restaurants participate, making it a convenient option.

STL

Take the MetroLink light rail from STL to downtown St. Louis. It's affordable and takes about 40 minutes, ideal for light luggage.

Our travel experts

Paul Rubio

Expert on BOS

Taryn White

Expert on STL

Best time to book a flight from Boston to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Boston with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to St. Louis

How far ahead should I book a flight from Boston to St. Louis?

To ensure you get the cheapest price possible for a flight from Boston to St. Louis, you should look to book at least 63 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boston to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Boston to St. Louis (average of $311). Flying from Boston to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from BOS to STL?

It’s typically best to fly out from Boston to St. Louis in the evening. Doing so could potentially save you 6% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Boston to St. Louis?

Travelers seeking maximum savings on their Boston to St. Louis flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Boston to St. Louis

The most flights from BOS to STL are scheduled on a Thursday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Boston to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,232 reviews

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,962 reviews

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,868 reviews

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Spirit Airlines

6.3

Okay

8,029 reviews

Southwest

8.0

Very good

4,232 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What airports do I use to fly from Boston to St. Louis?
If you wish to fly to St. Louis from Boston, then you need to book flights from Boston Logan Intl to Lambert-St Louis. There are 4 flights from Logan Intl (BOS) to Lambert-St Louis (STL) per day to choose from. Flights to St. Louis from Logan Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 2h 50m is how long a nonstop flight from Boston to Lambert-St Louis typically takes.
How popular is this Boston to St. Louis flight route?
Flights from Boston Logan Intl to Lambert-St Louis have been viewed 40 times in the past calendar month.
What are the cheapest airlines flying from Boston to St. Louis round-trip?
Cheapflights users have booked flights from Boston to St. Louis round-trip from $283. Other airlines that can offer you cheap pricing are Delta, from $285, and American Airlines, from $287. Spirit Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Boston to St. Louis one-way?
The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $58. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Boston to St. Louis for a low price.
What are the most reliable airlines from Boston to St. Louis?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to St. Louis on time: Iberia (100%), Republic Airways (100%), American Airlines (83%).
What are the cheapest flights from Boston to St. Louis?
Looking at all options, your cheapest flight can be booked for $128. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $137 on average our data indicates $409 when flying from Boston to St. Louis.
Can I find deals for flights from Boston to St. Louis that include hotel bookings?
Yes. In addition to deals on Boston to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to St. Louis.
Can I find deals for business class flights from Boston to St. Louis?
Yes. Cheapflights offers flight deals from Boston to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Boston to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Boston to St. Louis (average of $311). Flying from Boston to St. Louis in March is currently the most expensive (average of $356). 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.

See more FAQs

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Top 6 airlines flying from Boston to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$107	Average$186	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$113	Average$214	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$200	Average$300	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$257	Average$412	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$281	Average$449	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$325	Average$458	FlexibilityNo cancel fee	On-time63%

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$58+ Cheap flights from Boston to St. Louis (BOS - STL)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Boston Logan Intl to Lambert-St Louis are usually found in August or September, booked 63 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Boston to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Boston to St. Louis

Cheapest flights from Boston to St. LouisExplore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to St. Louis that are best for you.

The best insider tips for Boston to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to St. Louis trip

Airports

BOS

STL

Our travel experts

Best time to book a flight from Boston to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Boston with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Boston to St. Louis

How far ahead should I book a flight from Boston to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Boston to St. Louis. Price data was last updated on July 18, 2025.

What is the cheapest month to book a flight from Boston to St. Louis?

What is the cheapest time of day to fly from BOS to STL?

Find hourly flight availability from Boston to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 21, 2025.

What is the cheapest day to fly from Boston to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Boston to St. Louis. Price data was last updated on July 20, 2025.

Weekly flight availability from Boston to St. Louis

Explore weekly flight availability from Boston to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 21, 2025.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Boston to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airports do I use to fly from Boston to St. Louis?

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

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

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

What are the most reliable airlines from Boston to St. Louis?

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

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

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

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

What is the cheapest month to book a flight from Boston to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for Boston to St. Louis

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Top 6 airlines flying from Boston to St. Louis

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Cheapest flights from Boston to St. Louis
Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.