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$89+ Cheap flights from Massachusetts to St. Louis (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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Massachusetts to St. Louis

Keep the following information in mind while searching for Massachusetts to St. Louis flight deals. Data was last updated September 11, 2025.

Round-trip from

$176
(Frontier)

One-way from

$89
(Kiwi.com)

Popular in

April

Cheapest in

August

Average price

$385

Good round-trip deal

$344 or less

Good one-way deal

$169 or less
From Massachusetts to Lambert-St Louis
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One-way flight from Massachusetts to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($41 potential increase over avg. RT price).
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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 September 2025
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Price to beat on a round-trip flight from Massachusetts to Lambert-St Louis.
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Price to beat on a one-way flight from Massachusetts to Lambert-St Louis.
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Find flight deals from Massachusetts to St. Louis

Cheapest flights from Massachusetts to St. Louis
Explore the most affordable flight options available from Massachusetts to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:04 amBDL - STL
1 stop25h 12mFrontier
Fri 10/314:52 pmSTL - BDL
1 stop16h 10mFrontier
Deal found 9/10$176
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:40 pmBDL - STL
1 stop5h 40mSouthwest
Wed 11/124:25 pmSTL - BDL
1 stop4h 00mSouthwest
Deal found 9/10$184
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:50 pmALB - STL
1 stop5h 30mSouthwest
Tue 10/74:15 pmSTL - ALB
1 stop5h 10mSouthwest
Deal found 9/10$188
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/85:30 amBDL - STL
1 stop4h 40mSouthwest
Wed 10/156:30 amSTL - BDL
1 stop5h 30mSouthwest
Deal found 9/10$194
This Southwest deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:15 amBDL - STL
1 stop5h 25mSouthwest
Sat 11/81:55 pmSTL - BDL
1 stop7h 50mSouthwest
Deal found 9/9$197
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:04 amBDL - STL
1 stop25h 12mMultiple Airlines
Sun 10/2610:57 amSTL - BDL
1 stop30h 18mMultiple Airlines
Deal found 9/9$210
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:04 amBDL - STL
1 stop25h 12mMultiple Airlines
Sun 11/210:57 amSTL - BDL
1 stop30h 18mMultiple Airlines
Deal found 9/10$212
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:04 amBDL - STL
1 stop25h 12mMultiple Airlines
Fri 10/314:52 pmSTL - BDL
2 stops22h 20mMultiple Airlines
Deal found 9/10$214
This Southwest deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:45 amBDL - STL
2 stops8h 10mSouthwest
Sat 12/132:15 pmSTL - BDL
1 stop5h 30mSouthwest
Deal found 9/11$215
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amALB - STL
1 stop5h 49mUnited Airlines
Wed 10/225:00 amSTL - ALB
1 stop4h 46mUnited Airlines
Deal found 9/11$215
This American Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/255:19 pmBDL - STL
1 stop7h 39mAmerican Airlines
Wed 10/296:00 amSTL - BDL
1 stop4h 59mAmerican Airlines
Deal found 9/11$219
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/42:52 pmALB - STL
2 stops9h 55mUnited Airlines
Mon 10/63:23 pmSTL - ALB
1 stop5h 00mUnited Airlines
Deal found 9/10$220

Cheapflights Fare Finder

 
Customize your flight search to find flights from Massachusetts 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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Massachusetts to St. Louis that are best for you.

Fly from

Massachusetts

Fly to

St. Louis

Route

Depart

Return

Price

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Thu 10/23

10:04 am-10:16 am

1 stop25h 12m

Lambert-St Louis

Fri 10/31

4:52 pm-10:02 am

1 stop16h 10m

$176

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Wed 11/5

5:40 pm-10:20 pm

1 stop5h 40m

Lambert-St Louis

Wed 11/12

4:25 pm-9:25 pm

1 stop4h 00m

$184

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Sat 10/4

3:50 pm-8:20 pm

1 stop5h 30m

Lambert-St Louis

Tue 10/7

4:15 pm-10:25 pm

1 stop5h 10m

$188

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Wed 10/8

5:30 am-9:10 am

1 stop4h 40m

Lambert-St Louis

Wed 10/15

6:30 am-1:00 pm

1 stop5h 30m

$194

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Wed 11/5

5:15 am-9:40 am

1 stop5h 25m

Lambert-St Louis

Sat 11/8

1:55 pm-10:45 pm

1 stop7h 50m

$197

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Sat 12/6

3:35 pm-7:30 pm

1 stop4h 55m

Lambert-St Louis

Sat 12/13

2:15 pm-8:45 pm

1 stop5h 30m

$210

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Thu 10/16

6:00 am-10:49 am

1 stop5h 49m

Lambert-St Louis

Wed 10/22

5:00 am-10:46 am

1 stop4h 46m

$215

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Thu 10/16

6:00 am-10:49 am

1 stop5h 49m

Lambert-St Louis

Tue 10/21

6:30 am-2:16 pm

1 stop6h 46m

$215

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Sat 10/4

2:52 pm-11:47 pm

2 stops9h 55m

Lambert-St Louis

Mon 10/6

3:23 pm-9:23 pm

1 stop5h 00m

$220

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Fri 12/5

6:13 pm-8:11 am

1 stop14h 58m

Lambert-St Louis

Tue 12/9

4:01 pm-11:57 pm

1 stop6h 56m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 51 results
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Best time to book a flight from Massachusetts to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Massachusetts 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 Massachusetts to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $311). Flying from Massachusetts 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 MA to STL?

Find hourly flight availability from Massachusetts 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 September 11, 2025.

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

Related info for your journey

Find useful and relevant information for your journey from Massachusetts 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 airport do you fly into for flights to St. Louis from Massachusetts?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Massachusetts.

  • How popular is this Massachusetts to St. Louis flight route?

    The Massachusetts to Lambert-St Louis flight path was viewed by 44 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Massachusetts to St. Louis?

    Frontier, Southwest, and United Airlines can get you from Massachusetts to St. Louis in just under 5h 40m. Your travel time can differ by up to 19h 32m. Massachusetts and St. Louis are separated by a distance of 954 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $92. United Airlines flights start at $97 while deals on American Airlines start at $131 one-way.

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

    Most travelers choose Boston Logan Intl - Lambert-St Louis, Hartford Bradley Intl - Lambert-St Louis or Albany Intl - Lambert-St Louis when deciding on the best route from Massachusetts to St. Louis.

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

    The top 3 most reliable airlines when flying from Massachusetts to St. Louis are Iberia (98%), American Airlines (85%) and Envoy Air (85%).

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

    The cheapest flight price from Massachusetts to St. Louis is $108. On average you can expect to pay $329. The most popular route, (Boston Logan Intl - Lambert-St Louis), can usually be booked for $191.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Massachusetts 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 Massachusetts to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $311). Flying from Massachusetts 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Top 6 airlines flying from Massachusetts to St. Louis

Discover the top 6 airlines that operate flights from Massachusetts 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$83Average$186FlexibilityNo cancel feeOn-time65%
FrontierCheapest$113Average$213FlexibilityNo cancel feeOn-time62%
DeltaCheapest$216Average$291FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$257Average$412FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$298Average$459FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$324Average$462FlexibilityNo cancel feeOn-time63%

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