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 $185. Other airlines that can offer you cheap pricing are Spirit Airlines, from $243, and Sun Country Air, from $250. Frontier is priced at 55% 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 Frontier, with whom users have recently found tickets for as low as $97. However, be on the lookout for offers from Sun Country Air and Spirit Airlines, 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?

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

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

Looking at all options, your cheapest flight can be booked for $143. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $222 on average our data indicates $413 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: American Airlines (98%), Republic Airways (98%), JetBlue (97%).

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 $185, but on average you can expect to pay $241.

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

Cheapflights has at least 13 direct flights from Boston to St. Louis under $400. A good price for a nonstop flight from Boston to St. Louis is less than $502.

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

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

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

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, JetBlue, and Delta flying from Boston Logan Intl to Lambert-St Louis have implemented new flexible cancellation policies.

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

Thursday 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 43% on this flight, we recommend booking at least 39 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 $463 1-2 weeks out and tickets from $604 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 December. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from Boston in January are about $418 on average during January, but can be found for as low as $265.

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 8% on the flight price compared to flying in the afternoon, which is usually more expensive.

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.

Flights from Boston, MA to St. Louis, MO from $97

How to find the cheapest flight from Boston (BOS) to St. Louis (STL)

Popular in	December
Cheapest in	January
Round-trip from	$293
One-way from	$158

High demand for flights, 18% potential price rise

Search Deals

Best time to find cheap flights, 12% potential price drop

Search Deals

From Boston Logan Intl to Lambert-St Louis

Search Deals

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

Search Deals

BOS - STL Price	$293 - $471
STL Temperature	32 - 80.6 °F
STL Rainfall	2.2 - 4.7 inches

BOS - STL

Price

$293 - $471

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Cheap flights from Boston to St. Louis in June, July 2023

Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Jul 11 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 44m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$185

Frontier

Deal found 6/4

Jul 20 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$188

Frontier

Deal found 6/4

Jul 9 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

16h 04m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$208

Frontier

Deal found 6/4

Jul 6 - Jul 10

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 35m

$220

Frontier

Deal found 6/4

Jul 10 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

25h 32m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$236

Multiple Airlines

Deal found 6/4

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 26m

$237

Multiple Airlines

Deal found 6/4

Jul 4 - Jul 11

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

23h 43m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 41m

$243

Spirit Airlines

Deal found 6/4

Jun 22 - Jun 26

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 25m

$245

Frontier

Deal found 6/4

Jul 18 - Jul 21

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 44m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

14h 51m

$247

Multiple Airlines

Deal found 6/4

Boston to St. Louis 2023 flight deals

Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Jul 11 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 44m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$185

Frontier

Deal found 6/4

Jul 20 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$188

Frontier

Deal found 6/4

Jul 9 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

16h 04m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$208

Frontier

Deal found 6/4

Jul 6 - Jul 10

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 35m

$220

Frontier

Deal found 6/4

Sep 10 - Sep 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

6h 47m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

10h 09m

$230

Multiple Airlines

Deal found 6/4

Jul 10 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

25h 32m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$236

Multiple Airlines

Deal found 6/4

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 26m

$237

Multiple Airlines

Deal found 6/4

Jul 4 - Jul 11

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

23h 43m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 41m

$243

Spirit Airlines

Deal found 6/4

Jun 22 - Jun 26

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 25m

$245

Frontier

Deal found 6/4

Cheap Frontier flights from Boston to St. Louis

Consider these cheap Frontier flights we've found departing from Boston to St. Louis. Deals update often to give you more flight options matching your criteria

Jul 11 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 44m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$185

Frontier

Deal found 6/4

Jul 20 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$188

Frontier

Deal found 6/4

Jul 9 - Jul 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

16h 04m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

17h 34m

$208

Frontier

Deal found 6/4

Jul 6 - Jul 10

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 35m

$220

Frontier

Deal found 6/4

Jun 22 - Jun 26

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 25m

$245

Frontier

Deal found 6/4

Jun 15 - Jun 19

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 25m

$255

Frontier

Deal found 6/4

Sep 11 - Sep 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 25m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 27m

$265

Frontier

Deal found 6/4

Sep 10 - Sep 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 25m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 27m

$268

Frontier

Deal found 6/4

One of the most popular airlines traveling from Boston to St. Louis is Frontier. Flights from Frontier traveling this route typically cost $526.79 RT. This price is typically 35% cheaper than other airlines that offer Boston to St. Louis flights. When booking this route, the cheapest RT price found was $273. 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, Frontier flights are 4% more popular than any other airline flying that same route.

Cheap Spirit Airlines flights from Boston to St. Louis

Browse through some of the cheapest Spirit Airlines 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.

Jul 4 - Jul 11

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

23h 43m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 41m

$243

Spirit Airlines

Deal found 6/4

Jul 21 - Jul 25

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

6h 40m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 41m

$293

Spirit Airlines

Deal found 6/4

Sep 12 - Sep 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 50m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

10h 09m

$302

Spirit Airlines

Deal found 6/4

Jun 13 - Jun 16

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

19h 38m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

20h 06m

$303

Spirit Airlines

Deal found 6/4

Jun 13 - Jun 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

2 stops

13h 35m

STL

Lambert-St Louis

BOS

Boston Logan Intl

2 stops

22h 31m

$433

Spirit Airlines

Deal found 6/4

Jun 13 - Jun 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

2 stops

13h 35m

STL

Lambert-St Louis

BOS

Boston Logan Intl

3 stops

19h 13m

$458

Spirit Airlines

Deal found 6/4

Jun 14 - Jun 15

BOS

Boston Logan Intl

STL

Lambert-St Louis

2 stops

15h 25m

STL

Lambert-St Louis

BOS

Boston Logan Intl

2 stops

22h 31m

$599

Spirit Airlines

Deal found 6/4

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 58% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $418.80 RT. The cheapest Spirit Airlines flight found for this route was $235. 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 1% more popular than any other airline flying that same route.

Non-stop flights to St. Louis from Boston

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.

Jul 3 - Jul 11

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 39m

$386

American Airlines

Deal found 6/4

Jul 4 - Jul 11

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 39m

$396

American Airlines

Deal found 6/4

Jun 27 - Jul 2

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 41m

$397

American Airlines

Deal found 6/5

Jul 18 - Jul 18

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

2h 58m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 43m

$447

American Airlines

Deal found 6/3

Sep 22 - Sep 24

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 01m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 40m

$449

American Airlines

Deal found 6/4

Jul 9 - Jul 13

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

2h 58m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 39m

$452

JetBlue

Deal found 6/4

Jun 27 - Jun 29

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 41m

$516

American Airlines

Deal found 6/4

Jun 20 - Jun 29

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 41m

$519

American Airlines

Deal found 6/4

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

Nonstop

3h 00m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 41m

$542

JetBlue

Deal found 6/4

Last minute flights from Boston to St. Louis

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.

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 26m

$237

Multiple Airlines

Deal found 6/4

Jun 15 - Jun 19

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

16h 25m

$255

Frontier

Deal found 6/4

Jun 13 - Jun 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 42m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

18h 11m

$287

Multiple Airlines

Deal found 6/4

Jun 13 - Jun 16

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

19h 38m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

20h 06m

$303

Spirit Airlines

Deal found 6/4

Jun 14 - Jun 15

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

9h 43m

STL

Lambert-St Louis

BOS

Boston Logan Intl

1 stop

19h 00m

$322

Multiple Airlines

Deal found 6/4

Jun 13 - Jun 22

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

11h 29m

STL

Lambert-St Louis

BOS

Boston Logan Intl

2 stops

17h 31m

$334

Multiple Airlines

Deal found 6/4

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

Nonstop

2h 41m

$339

Multiple Airlines

Deal found 6/4

Jun 15 - Jun 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

STL

Lambert-St Louis

BOS

Boston Logan Intl

2 stops

17h 51m

$341

Multiple Airlines

Deal found 6/4

Jun 14 - Jun 15

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

9h 43m

STL

Lambert-St Louis

BOS

Boston Logan Intl

2 stops

13h 52m

$348

Multiple Airlines

Deal found 6/4

One-way flights to St. Louis from Boston

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.

Jul 20

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 40m

$97

Frontier

Deal found 6/5

Jul 18

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

15h 44m

$100

Frontier

Deal found 6/5

Jun 13

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 42m

$110

Frontier

Deal found 6/4

Jul 9

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

16h 04m

$117

Frontier

Deal found 6/4

Sep 6

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

25h 56m

$118

Sun Country Air

Deal found 6/5

Jul 9

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

16h 04m

$120

Frontier

Deal found 6/5

Aug 18

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

7h 14m

$123

Sun Country Air

Deal found 6/3

Jun 29

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

13h 28m

$127

Frontier

Deal found 6/4

Jun 13

BOS

Boston Logan Intl

STL

Lambert-St Louis

1 stop

14h 42m

$135

Frontier

Deal found 6/4

Find flights from Boston to St. Louis within your budget

Fly from

Fly to

Budget

$185 - $260

Route

Depart

Return

Price

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/11

1 stop15h 44m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

$185

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 7/20

1 stop15h 40m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

$188

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 7/9

1 stop16h 04m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

$208

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 9/10

1 stop6h 47m

Lambert-St Louis

Wed 9/20

1 stop10h 09m

$230

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 7/10

1 stop25h 32m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

$236

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 6/15

1 stop13h 28m

Lambert-St Louis

Tue 6/20

1 stop16h 26m

$237

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/4

1 stop23h 43m

Lambert-St Louis

Tue 7/11

1 stop16h 41m

$243

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 9/8

1 stop25h 56m

Lambert-St Louis

Sun 9/10

1 stop15h 18m

$250

Pick Dates

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 8/7

1 stop7h 19m

Lambert-St Louis

Fri 8/18

1 stop14h 51m

$260

Pick Dates

Flights are sorted by cheapest first

Deals found on 6/4

Reviews of Airlines Servicing St. Louis

Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and Sun Country Air 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.

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Delta

8.0

Very good

2,387 reviews

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Sun Country Air

7.4

Good

84 reviews

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

American Airlines

7.3

Good

2,149 reviews

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Spirit Airlines

6.5

Okay

1,060 reviews

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Frontier

5.9

Fair

677 reviews

Delta

8.0

Very good

2,387 reviews

Check prices

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Related info for your journey

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.

Alternative routes for Boston to St. Louis

Boston to Kansas Cityfrom $89 pp

Top 7 airlines flying from Boston to St. Louis

Airline	Cheapest	Average	Flexibility	On-time	COVID-19 safety
Spirit Airlines	Cheapest$142	Average$281	FlexibilityNo cancel fee	On-time65%	COVID-19 safety	Search Spirit Airlines flights
Frontier	Cheapest$180	Average$234	FlexibilityNo cancel fee	On-time62%	COVID-19 safety	Search Frontier flights
American Airlines	Cheapest$235	Average$419	FlexibilityNo cancel fee	On-time71%	COVID-19 safety	Search American Airlines flights
JetBlue	Cheapest$273	Average$527	FlexibilityNo cancel fee	On-time62%	COVID-19 safety	Search JetBlue flights
Delta	Cheapest$286	Average$395	FlexibilityNo cancel fee	On-timeN/A	COVID-19 safety	Search Delta flights
United Airlines	Cheapest$302	Average$377	FlexibilityNo cancel fee	On-time69%	COVID-19 safety	Search United Airlines flights
Alaska Airlines	Cheapest$366	Average$535	FlexibilityNo cancel fee	On-time75%	COVID-19 safety	Search Alaska Airlines flights

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Hourly flight availability from Boston to St. Louis

1%of flight departures	Early morningMidnight to 6 am
82%of flight departures	Morning6 am to noon
0%of flight departures	AfternoonNoon to 6 pm
17%of flight departures	Evening6 pm to midnight

Midnight

6 AM

Noon

6 PM

Weekly flight availability from Boston to St. Louis

Sunday	7daily flights
Monday	6daily flights
Tuesday	6daily flights
Wednesday	6daily flights
Thursday	6daily flights
Friday	6daily flights
Saturday	3daily flights

Cheap flights from Boston to St. Louis (BOS - STL) from $97

This is the cheapest one-way flight price, found on 6/5. Prices may vary by date and flight preferences.

The best prices from Boston Logan Intl to Lambert-St Louis are usually found in January or September, booked 39 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

How to find the cheapest flight from Boston (BOS) to St. Louis (STL)

All the information you need to plan the best BOS to STL flight in 2023: compare Boston to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

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Cheap flights from Boston to St. Louis in June, July 2023

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Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Boston to St. Louis 2023 flight deals

Cheap flights to St. Louis from Boston found for this year

Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Cheap Frontier flights from Boston to St. Louis

Consider these cheap Frontier flights we've found departing from Boston to St. Louis. Deals update often to give you more flight options matching your criteria

Cheap Spirit Airlines flights from Boston to St. Louis

Browse through some of the cheapest Spirit Airlines 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.

Non-stop flights to St. Louis from Boston

Save time with Boston to St. Louis direct flight deals

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Last minute flights from Boston to St. Louis

Late deals on return flights to St. Louis from Boston, departing today and this week

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One-way flights to St. Louis from Boston

The cheapest one-way flights from Boston to St. Louis

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Find flights from Boston to St. Louis within your budget

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Reviews of Airlines Servicing St. Louis

Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and Sun Country Air 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.

Related info for your journey

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

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Alternative routes for Boston to St. Louis

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Top 7 airlines flying from Boston to St. Louis

The chart below displays the airlines Cheapflights users traveling from Boston to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

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Hourly flight availability from Boston to St. Louis

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