Cheap flights from Boston to St. Louis (BOS - STL) from $88

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 5/11. 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.
BOS — STL
Mar 24 — Mar 311

The best prices from Boston Logan Intl to Lambert-St Louis are usually found in February or January, booked 81 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Boston to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to St. Louis (STL). 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 March 19, 2024.

Popular in

November

Cheapest in

February

Round-trip from

$323

One-way from

$107
High demand for flights, 11% potential price rise
Best time to find cheap flights, 16% potential price drop
From Boston Logan Intl to Lambert-St Louis
One-way flight from Boston Logan Intl to Lambert-St Louis

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

Sunday 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 84% on this flight, we recommend booking at least 35 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 $534 1-2 weeks out and tickets from $645 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 November. For low rates, February can be a great choice for travel to St. Louis. Flights to St. Louis from Boston in February are about $450 on average during February, but can be found for as low as $147.

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

It’s typically best to fly out from Boston to St. Louis at noon. Doing so could potentially save you 15% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap Spirit Airlines flights from Boston to St. Louis

Explore cheap flight options specifically provided by Spirit Airlines for the route between Boston and St. Louis. 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 3,145,932 searches. Data last updated March 19, 2024.
Consider these cheap Spirit Airlines flights we've found departing from Boston to St. Louis. Deals update often to give you more flight options matching your criteria
Wed 5/156:40 pmBOS - STL
1 stop23h 49mSpirit Airlines
Tue 5/2110:34 amSTL - BOS
1 stop13h 23mSpirit Airlines
Deal found 3/18$193
Sat 5/186:10 amBOS - STL
1 stop12h 19mSpirit Airlines
Tue 5/2110:34 amSTL - BOS
2 stops11h 52mSpirit Airlines
Deal found 3/18$225
Tue 4/23:56 pmBOS - STL
1 stop29h 17mSpirit Airlines
Sat 4/611:39 amSTL - BOS
1 stop10h 35mSpirit Airlines
Deal found 3/18$230
Fri 5/109:00 pmBOS - STL
1 stop14h 28mSpirit Airlines
Tue 5/1410:34 amSTL - BOS
1 stop13h 23mSpirit Airlines
Deal found 3/17$231
Tue 4/23:56 pmBOS - STL
1 stop29h 17mSpirit Airlines
Fri 4/510:57 amSTL - BOS
1 stop11h 17mSpirit Airlines
Deal found 3/18$234
Tue 4/25:45 pmBOS - STL
3 stops27h 28mSpirit Airlines
Sat 4/611:39 amSTL - BOS
1 stop10h 35mSpirit Airlines
Deal found 3/18$247
Tue 4/25:45 pmBOS - STL
3 stops27h 28mSpirit Airlines
Sat 4/611:39 amSTL - BOS
1 stop10h 35mSpirit Airlines
Deal found 3/18$252
Wed 3/2710:50 amBOS - STL
2 stops10h 23mSpirit Airlines
Fri 3/2910:57 amSTL - BOS
1 stop11h 17mSpirit Airlines
Deal found 3/18$273
Wed 3/2710:50 amBOS - STL
2 stops10h 23mSpirit Airlines
Thu 3/287:48 pmSTL - BOS
1 stop14h 34mSpirit Airlines
Deal found 3/18$288
  • If you’re traveling from Boston to St. Louis, one of the more common airlines traveling that route is Spirit Airlines. Boston to St. Louis flights are typically 36% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $541.80 RT. The cheapest Spirit Airlines flight found for this route was $417. When traveling from Boston to St. Louis on Spirit Airlines, the most popular airport to depart from is Boston Logan Intl Airport and the most popular airport to arrive at is Lambert-St Louis Airport. When flying from Boston to St. Louis, Spirit Airlines flights are 5% more popular than any other airline flying that same route.

Cheap Delta flights from Boston to St. Louis

Explore cheap flight options specifically provided by Delta for the route between Boston and St. Louis. 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 3,145,932 searches. Data last updated March 19, 2024.
Browse through some of the cheapest Delta flights traveling from Boston to St. Louis. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Mon 5/65:45 amBOS - STL
1 stop7h 11mDelta
Sat 5/115:29 pmSTL - BOS
1 stop5h 00mDelta
Deal found 3/17$214
Sun 5/125:35 amBOS - STL
1 stop4h 44mDelta
Tue 5/146:10 pmSTL - BOS
1 stop4h 18mDelta
Deal found 3/17$293
Tue 5/710:10 amBOS - STL
1 stop5h 07mDelta
Thu 5/166:00 amSTL - BOS
1 stop6h 27mDelta
Deal found 3/17$317
Thu 5/910:00 amBOS - STL
1 stop5h 10mDelta
Fri 5/177:10 pmSTL - BOS
1 stop4h 55mDelta
Deal found 3/17$326
Tue 5/215:35 amBOS - STL
1 stop4h 44mDelta
Tue 5/216:10 pmSTL - BOS
1 stop4h 18mDelta
Deal found 3/18$384
Sat 5/185:35 amBOS - STL
1 stop4h 44mDelta
Fri 5/247:10 pmSTL - BOS
1 stop4h 55mDelta
Deal found 3/18$389
Tue 8/131:00 pmBOS - STL
1 stop6h 02mDelta
Wed 10/29:40 amSTL - BOS
1 stop6h 36mDelta
Deal found 3/18$390
Mon 3/259:00 amBOS - STL
1 stop5h 14mDelta
Mon 3/256:26 pmSTL - BOS
1 stop4h 26mDelta
Deal found 3/18$490
  • One of the most popular airlines traveling from Boston to St. Louis is Delta. Flights from Delta traveling this route typically cost $451.80 RT. This price is typically 47% cheaper than other airlines that offer Boston to St. Louis flights. When booking this route, the cheapest RT price found was $278. Boston Logan Intl Airport is the most common Boston airport to take off from when flying to St. Louis. Lambert-St Louis Airport is the most popular arrival airport in St. Louis. When flying from Boston to St. Louis, Delta flights are 0% more popular than any other airline flying that same route.

Cheap Boston to St. Louis flights in March & April 2024

Find cheap flight options from Boston to St. Louis specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
Check out some of the best flight deals from Boston to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Mon 4/89:45 amBOS - STL
1 stop23h 36mFrontier
Mon 4/159:11 pmSTL - BOS
1 stop9h 57mFrontier
Deal found 3/18$148
Thu 4/49:45 amBOS - STL
1 stop23h 36mFrontier
Sun 4/78:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/17$158
Thu 4/411:23 amBOS - STL
2 stops21h 58mFrontier
Sun 4/78:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/17$163
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Sun 3/318:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/18$178
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Sat 3/307:53 amSTL - BOS
1 stop23h 52mFrontier
Deal found 3/18$179
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Fri 3/291:17 pmSTL - BOS
1 stop18h 28mFrontier
Deal found 3/18$180
Wed 3/279:45 amBOS - STL
1 stop11h 28mMultiple Airlines
Thu 3/287:48 pmSTL - BOS
1 stop11h 57mMultiple Airlines
Deal found 3/18$181
Thu 4/411:23 amBOS - STL
2 stops21h 58mFrontier
Sat 4/64:20 pmSTL - BOS
1 stop15h 25mFrontier
Deal found 3/18$185
Fri 4/2610:12 pmBOS - STL
1 stop13h 28mMultiple Airlines
Sun 4/287:16 pmSTL - BOS
1 stop11h 52mMultiple Airlines
Deal found 3/18$186

Boston to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Boston and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Check out some of the best flight deals from Boston to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Sat 4/69:45 amBOS - STL
1 stop23h 36mFrontier
Sun 4/78:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/18$198
Mon 5/69:10 pmBOS - STL
1 stop11h 03mMultiple Airlines
Tue 5/1410:34 amSTL - BOS
2 stops11h 52mMultiple Airlines
Deal found 3/17$200
Wed 5/110:21 amBOS - STL
2 stops11h 32mMultiple Airlines
Tue 5/77:16 pmSTL - BOS
1 stop16h 47mMultiple Airlines
Deal found 3/18$201
Fri 4/2610:12 pmBOS - STL
1 stop13h 28mMultiple Airlines
Mon 4/299:11 pmSTL - BOS
1 stop9h 57mMultiple Airlines
Deal found 3/18$205
Mon 5/69:10 pmBOS - STL
1 stop11h 03mMultiple Airlines
Mon 5/139:11 pmSTL - BOS
1 stop9h 57mMultiple Airlines
Deal found 3/17$212
Thu 5/96:10 amBOS - STL
1 stop12h 19mMultiple Airlines
Mon 5/139:11 pmSTL - BOS
1 stop9h 57mMultiple Airlines
Deal found 3/17$213
Mon 5/65:45 amBOS - STL
1 stop7h 11mDelta
Sat 5/115:29 pmSTL - BOS
1 stop5h 00mDelta
Deal found 3/17$214
Sun 4/79:45 amBOS - STL
1 stop10h 05mMultiple Airlines
Mon 4/85:35 pmSTL - BOS
1 stop14h 10mMultiple Airlines
Deal found 3/18$216
Sun 4/79:45 amBOS - STL
1 stop10h 05mMultiple Airlines
Mon 4/85:35 pmSTL - BOS
1 stop14h 10mMultiple Airlines
Deal found 3/18$218

Non-stop flights to St. Louis from Boston

Discover non-stop flight options from Boston to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Take a look at some of the direct flights traveling from Boston to St. Louis in the near future. Select from other flights from Boston to St. Louis by using the search form above.
Wed 4/1711:05 amBOS - STL
Nonstop3h 12mAmerican Airlines
Wed 4/241:47 pmSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 3/18$311
Tue 6/47:00 amBOS - STL
Nonstop3h 10mAmerican Airlines
Wed 6/56:51 pmSTL - BOS
Nonstop2h 43mAmerican Airlines
Deal found 3/18$341
Sun 4/217:00 amBOS - STL
Nonstop3h 24mAmerican Airlines
Wed 4/2410:30 amSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 3/18$351
Sun 5/197:00 amBOS - STL
Nonstop3h 10mAmerican Airlines
Wed 5/221:40 pmSTL - BOS
Nonstop2h 49mAmerican Airlines
Deal found 3/18$371
Wed 5/157:00 amBOS - STL
Nonstop3h 10mAmerican Airlines
Fri 5/171:40 pmSTL - BOS
Nonstop2h 49mAmerican Airlines
Deal found 3/18$383
Thu 4/1811:05 amBOS - STL
Nonstop3h 12mAmerican Airlines
Fri 4/261:47 pmSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 3/18$391
Thu 4/411:05 amBOS - STL
Nonstop3h 12mAmerican Airlines
Wed 4/1010:30 amSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 3/18$396
Fri 5/2411:02 amBOS - STL
Nonstop3h 07mAmerican Airlines
Sun 5/2610:30 amSTL - BOS
Nonstop2h 49mAmerican Airlines
Deal found 3/18$413
Mon 4/87:00 amBOS - STL
Nonstop3h 24mAmerican Airlines
Mon 4/1510:30 amSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 3/18$433

Boston to St. Louis flights leaving soon

Find last-minute flight options from Boston to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Have a look at some of the last-minute flights available departing from Boston to St. Louis. Users should examine the flight details to ensure there are no surprises.
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Sun 3/318:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/18$178
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Sat 3/307:53 amSTL - BOS
1 stop23h 52mFrontier
Deal found 3/18$179
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Fri 3/291:17 pmSTL - BOS
1 stop18h 28mFrontier
Deal found 3/18$180
Wed 3/279:45 amBOS - STL
1 stop11h 28mMultiple Airlines
Thu 3/287:48 pmSTL - BOS
1 stop11h 57mMultiple Airlines
Deal found 3/18$181
Wed 3/271:15 pmBOS - STL
1 stop7h 58mMultiple Airlines
Fri 3/298:24 pmSTL - BOS
1 stop11h 21mMultiple Airlines
Deal found 3/18$191
Tue 3/265:17 pmBOS - STL
1 stop15h 54mMultiple Airlines
Wed 3/279:08 pmSTL - BOS
1 stop10h 37mMultiple Airlines
Deal found 3/18$193
Tue 3/265:17 pmBOS - STL
1 stop15h 54mMultiple Airlines
Wed 3/279:08 pmSTL - BOS
2 stops14h 13mMultiple Airlines
Deal found 3/18$240
Thu 3/289:45 amBOS - STL
1 stop27h 32mFrontier
Sun 3/318:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/17$251
Thu 3/289:45 amBOS - STL
1 stop27h 32mFrontier
Fri 3/298:24 pmSTL - BOS
1 stop11h 21mFrontier
Deal found 3/18$267

One-way flights to St. Louis from Boston

Search for one-way flight options from Boston to St. Louis. 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 3,145,932 searches. Data last updated March 19, 2024.
Take a look at some of the one-way flights we've detected from Boston to St. Louis. Users in need of a round-trip flight from Boston to St. Louis instead should update the search form at the top of page.
Sat 5/116:10 amBOS - STL
1 stop12h 19mSpirit Airlines
Deal found 3/18$88
Wed 4/39:45 amBOS - STL
1 stop11h 28mMultiple Airlines
Deal found 3/18$90
Tue 3/269:45 amBOS - STL
1 stop23h 26mFrontier
Deal found 3/18$95
Thu 4/49:45 amBOS - STL
1 stop23h 36mFrontier
Deal found 3/17$99
Thu 4/411:23 amBOS - STL
2 stops21h 58mFrontier
Deal found 3/17$104
Thu 5/168:00 amBOS - STL
1 stop5h 16mDelta
Deal found 3/17$107
Wed 4/38:21 amBOS - STL
2 stops25h 00mFrontier
Deal found 3/18$109
Wed 4/1712:46 pmBOS - STL
2 stops29h 48mMultiple Airlines
Deal found 3/18$114
Wed 4/1712:46 pmBOS - STL
2 stops29h 48mMultiple Airlines
Deal found 3/18$122

Find flights from Boston to St. Louis within your budget

Customize your flight search to find flights from Boston to St. Louis 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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$148 - $266

Route

Depart

Return

Price

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 4/8

1 stop23h 36m

Lambert-St Louis

Mon 4/15

1 stop9h 57m

$148

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 4/4

1 stop23h 36m

Lambert-St Louis

Sun 4/7

1 stop11h 21m

$158

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 4/4

2 stops21h 58m

Lambert-St Louis

Sun 4/7

1 stop11h 21m

$163

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 5/3

1 stop13h 28m

Lambert-St Louis

Sun 5/5

1 stop11h 52m

$173

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 4/26

1 stop13h 28m

Lambert-St Louis

Sun 4/28

1 stop11h 52m

$186

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 5/15

1 stop23h 49m

Lambert-St Louis

Tue 5/21

1 stop13h 23m

$193

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 5/6

1 stop7h 11m

Lambert-St Louis

Sat 5/11

1 stop5h 00m

$214

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 9/12

1 stop7h 20m

Lambert-St Louis

Sun 9/15

1 stop15h 19m

$265

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 4/30

1 stop9h 11m

Lambert-St Louis

Sat 5/4

1 stop9h 30m

$266

Flights are sorted by cheapest first

Deals found on 3/18

When is the best time to 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 January 28, 2024.
To ensure you get the cheapest price possible for a flight from Boston to St. Louis, you should look to book at least 81 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.
Search Deals

When is the cheapest time 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 March 10, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Boston to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Boston to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Boston to St. Louis is currently $103 while a round-trip flight costs $196. Price data was last updated on March 10, 2024.

Currently, September is the cheapest month in which you can book a flight from Boston to St. Louis (average of $323). Flying from Boston to St. Louis in June is currently the most expensive (average of $386). 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

$326

February

$331

March

$358

April

$356

May

$358

June

$386

July

$382

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated March 19, 2024.
Peruse reviews from past customers who have flown with Spirit Airlines, Delta and American Airlines from Boston to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very good
11,551 reviews
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

7.4
Good
11,602 reviews
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

7.3
Good
15,312 reviews
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

7.3
Good
704 reviews
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

6.5
Okay
8,875 reviews
8.1
Very good
11,551 reviews

Overall

8.1

Food

7.5

Entertainment

8.1

Boarding

8.2

Crew

8.6

Comfort

7.9

Reviews

1 / 10

It was a good experience other than a short delay.

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?

    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 5 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 7 different airlines, which means you should have some options if you want to compare airfare deals. 2h 58m is how long a nonstop flight from Boston to Lambert-St Louis typically takes.

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

    Yes, there are multiple flights from Boston to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $148, but on average you can expect to pay $184.

  • Are there nonstop flights from Boston to St. Louis for under $400 on Cheapflights?

    Cheapflights has at least 20 direct flights from Boston to St. Louis under $400. A good price for a nonstop flight from Boston to St. Louis is less than $448.

  • Are there last-minute flights available from Boston to St. Louis for under $200?

    There are currently 20+ open flights from Boston to St. Louis within the next 7 days for less than $200.

  • 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 $148. Other airlines that can offer you cheap pricing are Spirit Airlines, from $193, and Delta, from $214. Frontier is priced at 67% 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 $88. However, be on the lookout for offers from Frontier and Delta, as they are both options that can get you from Boston to St. Louis for a low price.

  • What are the most popular airlines that fly 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: Southwest (91%), Qatar Airways (88%), American Airlines (87%).

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

    Looking at all options, your cheapest flight can be booked for $155. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $147 on average our data indicates $335 when flying from Boston to St. Louis.

  • What does BOS to STL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Boston Logan Intl Airport to Lambert-St Louis Airport flight would often be abbreviated as a BOS to STL flight.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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

Top 7 airlines flying from Boston to St. Louis

Discover the top 7 airlines that operate flights from Boston to St. Louis. 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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$104Average$243FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$147Average$242FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$197Average$395FlexibilityNo cancel feeOn-timeN/A
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American AirlinesCheapest$278Average$452FlexibilityNo cancel feeOn-time71%
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United AirlinesCheapest$318Average$582FlexibilityNo cancel feeOn-time69%
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Alaska AirlinesCheapest$366Average$535FlexibilityNo cancel feeOn-time75%
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JetBlueCheapest$417Average$542FlexibilityNo cancel feeOn-time62%
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Search flights from Boston to St. Louis by cabin class

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

Hourly flight availability from Boston to St. Louis

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 March 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
83%of flight departuresMorning6 am to noon
6%of flight departuresAfternoonNoon to 6 pm
10%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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 March 19, 2024.
Sunday7daily flights
Monday6daily flights
Tuesday6daily flights
Wednesday6daily flights
Thursday6daily flights
Friday6daily flights
Saturday3daily flights

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 Boston to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Louis from Boston.

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

Certainly. Search results for flights to St. Louis from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Boston to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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