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$54+ Cheap flights from St. Louis to Boston (STL - BOS)

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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOS
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
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The best prices from Lambert-St Louis to Boston Logan Intl are usually found in February or August, booked 84 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from St. Louis to Boston

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$247
(Priceline)

One-way from

$54
(Frontier)

Popular in

April

Cheapest in

February

Average price

$442
Provider with most accurate pricing for Lambert-St Louis-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Boston Logan Intl flights.
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From Lambert-St Louis to Boston Logan Intl
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One-way flight from Lambert-St Louis to Boston Logan Intl
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High demand for flights, 7% potential price rise
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Best time to find cheap flights, 1% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from St. Louis to Boston

Cheapest flights from St. Louis to Boston
Explore the most affordable flight options available from St. Louis to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 19, 2024.

This Delta deal was found by Cheapflights users on 12/18. 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 12/315:55 pmSTL - BOS
1 stop4h 56mDelta
Tue 1/710:00 amBOS - STL
1 stop7h 53mDelta
Deal found 12/18$248
This Mytrip deal was found by Cheapflights users on 12/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/313:53 pmSTL - BOS
1 stop7h 46mFrontier
Thu 1/26:00 amBOS - STL
1 stop18h 28mFrontier
Deal found 12/19$317
This CheapOair deal was found by Cheapflights users on 12/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/313:53 pmSTL - BOS
1 stop7h 46mMultiple Airlines
Sat 1/410:34 amBOS - STL
1 stop29h 47mMultiple Airlines
Deal found 12/18$324
This American Airlines deal was found by Cheapflights users on 12/18. 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.
Wed 12/252:09 pmSTL - BOS
Nonstop2h 34mAmerican Airlines
Wed 1/19:09 amBOS - STL
1 stop5h 28mAmerican Airlines
Deal found 12/18$371
This Southwest deal was found by Cheapflights users on 12/18. 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 12/256:15 pmSTL - BOS
Nonstop2h 30mSouthwest
Wed 1/18:00 amBOS - STL
Nonstop3h 10mSouthwest
Deal found 12/18$442
This Mytrip deal was found by Cheapflights users on 12/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/285:52 pmSTL - BOS
1 stop14h 37mSpirit Airlines
Fri 1/39:54 pmBOS - STL
2 stops20h 08mSpirit Airlines
Deal found 12/18$525
This United deal was found by Cheapflights users on 12/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/305:00 amSTL - BOS
1 stop5h 12mUnited Airlines
Wed 1/15:45 amBOS - STL
2 stops15h 12mUnited Airlines
Deal found 12/18$668
This Alaska Airlines deal was found by Cheapflights users on 12/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2611:36 amSTL - BOS
2 stops16h 54mAlaska Airlines
Sun 1/58:20 pmBOS - STL
2 stops18h 33mAlaska Airlines
Deal found 12/18$1,180

Find flights from St. Louis to Boston within your budget

Customize your flight search to find flights from St. Louis to Boston 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 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/16

4:28 pm-4:35 pm

2 stops23h 07m

Boston Logan Intl

Thu 1/23

6:00 am-2:43 pm

1 stop9h 43m

$236

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/23

5:05 pm-12:27 am

1 stop6h 22m

Boston Logan Intl

Tue 1/28

6:00 am-2:43 pm

1 stop9h 43m

$247

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Tue 12/31

5:55 pm-11:51 pm

1 stop4h 56m

Boston Logan Intl

Wed 1/1

5:25 am-9:33 am

1 stop5h 08m

$248

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Sun 4/6

4:57 pm-12:47 am

1 stop6h 50m

Boston Logan Intl

Tue 4/8

6:00 am-11:46 pm

1 stop18h 46m

$273

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Sat 2/1

8:00 am-6:26 pm

2 stops9h 26m

Boston Logan Intl

Tue 2/4

6:00 am-2:14 pm

2 stops9h 14m

$306

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 1/17

7:18 am-3:27 pm

1 stop7h 09m

Boston Logan Intl

Fri 1/24

6:30 am-8:54 am

Nonstop3h 24m

$355

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/23

7:50 am-1:20 pm

1 stop4h 30m

Boston Logan Intl

Tue 1/28

5:45 am-1:45 pm

2 stops9h 00m

$369

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 4/10

6:44 am-3:39 pm

2 stops31h 55m

Boston Logan Intl

Tue 4/15

7:00 am-11:59 pm

1 stop17h 59m

$503

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Wed 1/22

5:05 pm-12:27 am

1 stop6h 22m

$54

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/23

4:28 pm-10:36 am

1 stop17h 08m

$96

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 16 results
1
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Compare providers for flights from St. Louis to Boston

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Boston in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy2 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

Travel insights for flights from St. Louis to Boston

Get recent, data-driven insights about flights from St. Louis to Boston including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Boston. Price data was last updated on December 13, 2024.

The best time to book flights from St. Louis to Boston is 84 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Boston (average of $218). Flying from St. Louis to Boston in July is currently the most expensive (average of $311). 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 STL to BOS?

Find hourly flight availability from St. Louis to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 19, 2024.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Boston in the evening. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Boston. Price data was last updated on December 16, 2024.

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

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boston, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated December 19, 2024.
Peruse reviews from past customers who have flown with Frontier, United Airlines and American Airlines from St. Louis to Boston 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.
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,836 reviews
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,551 reviews
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,600 reviews
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,048 reviews
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,836 reviews

Overall

8.1

Food

7.2

Crew

8.7

Comfort

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Boston. 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 St. Louis to Boston?

    Booking a flight from Lambert-St Louis (STL) to Boston Logan Intl (BOS) is your only option if you wish to fly from St. Louis to Boston. On a typical day, there are 3 flights from Lambert-St Louis to Logan Intl, all of which are around 2h 30m for a nonstop flight. You can also purchase a plane ticket from 6 airlines when you book a flight from Lambert-St Louis to Boston.

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

    The Lambert-St Louis to Boston Logan Intl flight path was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, Delta ($248), Frontier ($278), and United Airlines ($306) offers the cheapest pricing from St. Louis to Boston. Users have found that Delta is 39% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $54. Spirit Airlines flights start at $96 while deals on Delta start at $108 one-way.

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

    No one likes to see their flight delayed. When booking a flight from St. Louis to Boston consider choosing Republic Airways (94%), Iberia (84%) or American Airlines (84%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from St. Louis to Boston is generally $611, our data shows the cheapest flight currently is $187. When looking at the most popular route, (Lambert-St Louis - Boston Logan Intl), you can expect to pay $140 for that flight.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Boston (average of $218). Flying from St. Louis to Boston in July is currently the most expensive (average of $311). 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 St. Louis to Boston

Discover the top 6 airlines that operate flights from St. Louis to Boston. 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 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$97Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$163Average$228FlexibilityNo cancel feeOn-time65%
DeltaCheapest$195Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$247Average$431FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$252Average$417FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$286Average$462FlexibilityNo cancel feeOn-time63%
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