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St. Louis

$69+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap 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 December 26, 2025.

This United Airlines deal was found by Cheapflights users on 12/24. 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.
Wed 12/315:20 amBOS - STL
1 stop5h 48mUnited Airlines
Wed 12/313:10 pmSTL - BOS
2 stops7h 44mUnited Airlines
Deal found 12/24$402
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Wed 12/3110:25 amBOS - STL
2 stops8h 29mUnited Airlines
Thu 1/18:05 amSTL - BOS
2 stops9h 08mUnited Airlines
Deal found 12/24$407
This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Wed 12/3111:09 amBOS - STL
1 stop23h 31mFrontier
Sun 1/410:57 amSTL - BOS
1 stop21h 45mFrontier
Deal found 12/24$433
This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Tue 12/3010:37 amBOS - STL
2 stops36h 56mFrontier
Sun 1/410:57 amSTL - BOS
1 stop21h 45mFrontier
Deal found 12/24$440
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:00 pmBOS - STL
1 stop24h 59mDelta
Thu 1/16:29 amSTL - BOS
1 stop4h 30mDelta
Deal found 12/24$465
This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Wed 12/3111:09 amBOS - STL
2 stops24h 47mMultiple Airlines
Sun 1/410:57 amSTL - BOS
1 stop21h 45mMultiple Airlines
Deal found 12/24$472
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:40 amBOS - STL
1 stop7h 41mDelta
Sat 1/35:40 pmSTL - BOS
1 stop13h 40mDelta
Deal found 12/24$490
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Tue 12/307:44 pmBOS - STL
1 stop15h 24mUnited Airlines
Thu 1/18:15 amSTL - BOS
1 stop5h 05mUnited Airlines
Deal found 12/24$560
This Kiwi.com deal was found by Cheapflights users on 12/23. 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.
Wed 12/3111:09 amBOS - STL
1 stop23h 31mMultiple Airlines
Sat 1/34:27 pmSTL - BOS
1 stop16h 34mMultiple Airlines
Deal found 12/23$574
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:10 amBDL - STL
1 stop6h 18mDelta
Wed 12/316:00 amSTL - BDL
1 stop6h 14mDelta
Deal found 12/24$638
This American Airlines deal was found by Cheapflights users on 12/24. 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.
Fri 12/269:59 amBDL - STL
1 stop14h 56mAmerican Airlines
Fri 1/26:35 pmSTL - BDL
1 stop13h 34mAmerican Airlines
Deal found 12/24$675
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Sun 12/282:50 pmBDL - STL
1 stop5h 32mUnited Airlines
Wed 12/313:10 pmSTL - BDL
2 stops7h 48mUnited Airlines
Deal found 12/24$678

Find 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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$181
(Trip.com)

One-way from

$69
(Kiwi.com)

Popular in

April

Cheapest in

August

Average price

$462

Good round-trip deal

$374 or less

Good one-way deal

$211 or less
Provider with most accurate pricing for Boston Logan Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Lambert-St Louis flights.
Search Deals
From Massachusetts to Lambert-St Louis
Search Deals
One-way flight from Massachusetts to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Massachusetts to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Massachusetts to Lambert-St Louis.
Search Deals

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 December 26, 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

Sat 1/10

12:38 pm-10:33 pm

1 stop10h 55m

Lambert-St Louis

Wed 1/14

5:11 pm-5:11 pm

1 stop23h 00m

$181

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Tue 2/10

5:00 am-9:24 am

1 stop5h 24m

Lambert-St Louis

Tue 2/10

6:46 pm-11:55 pm

1 stop4h 09m

$277

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Tue 2/10

5:30 am-11:15 am

1 stop6h 45m

Lambert-St Louis

Tue 2/10

2:15 pm-10:05 pm

2 stops6h 50m

$303

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Sat 1/17

4:20 pm-9:13 pm

1 stop5h 53m

Lambert-St Louis

Tue 1/20

3:11 pm-9:23 pm

1 stop5h 12m

$305

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Wed 2/18

6:05 am-10:43 am

1 stop5h 38m

Lambert-St Louis

Sun 2/22

5:50 pm-11:39 pm

1 stop4h 49m

$328

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Wed 2/18

12:10 pm-7:00 pm

1 stop7h 50m

Lambert-St Louis

Sun 2/22

2:05 pm-12:10 am

1 stop9h 05m

$328

HartfordSt. Louis

BDL - STL

BDLSTL

Hartford Bradley Intl

Thu 2/19

4:52 pm-11:36 pm

1 stop7h 44m

Lambert-St Louis

Sat 2/21

6:35 am-12:11 pm

1 stop4h 36m

$329

AlbanySt. Louis

ALB - STL

ALBSTL

Albany Intl

Wed 2/25

2:30 pm-8:09 pm

1 stop6h 39m

Lambert-St Louis

Sun 3/1

5:39 pm-11:02 pm

1 stop4h 23m

$332

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/24

6:30 am-9:03 am

Nonstop3h 33m

Lambert-St Louis

Sat 1/31

12:06 pm-3:45 pm

Nonstop2h 39m

$351

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 1/12

3:43 pm-10:33 pm

1 stop7h 50m

Lambert-St Louis

Fri 1/16

8:32 pm-1:13 am

1 stop27h 41m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 55 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, December is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $107). Flying from Massachusetts to St. Louis in April is currently the most expensive (average of $327). 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 December 26, 2025.

When flying from Massachusetts to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 22% versus a flight in the afternoon.

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

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

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

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 57 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, American Airlines, and Southwest can get you from Massachusetts to St. Louis in just under 5h 24m. Your travel time can differ by up to 5h 31m. Massachusetts and St. Louis are separated by a distance of 908 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 Frontier, which is currently one of the cheapest options available, starting at $65. Spirit Airlines flights start at $97 while deals on Delta start at $118 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 (100%), Republic Airways (86%) and American Airlines (76%).

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

    The cheapest flight price from Massachusetts to St. Louis is $114. On average you can expect to pay $387. The most popular route, (Boston Logan Intl - Lambert-St Louis), can usually be booked for $132.

  • 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, December is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $107). Flying from Massachusetts to St. Louis in April is currently the most expensive (average of $327). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Massachusetts to St. Louis

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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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$71Average$236FlexibilityNo cancel feeOn-time65%
FrontierCheapest$90Average$283FlexibilityNo cancel feeOn-time62%
DeltaCheapest$216Average$314FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$290Average$453FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$292Average$406FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$321Average$470FlexibilityNo cancel feeOn-time63%

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