Cheap flights from Boston to St. Louis (BOS - STL) from $55

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 8/14. 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
Jun 11 — Jun 181

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 June 6, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$318

One-way from

$127
High demand for flights, 13% potential price rise
Best time to find cheap flights, 22% 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 87% on this flight, we recommend booking at least 30 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 $554 1-2 weeks out and tickets from $644 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 June. For low rates, February can be a great choice for travel to St. Louis. Flights to St. Louis from Boston in February are about $443 on average during February, but can be found for as low as $158.

What is the cheapest time of day to fly from BOS to STL?

It’s typically best to fly out from Boston to St. Louis at noon. Doing so could potentially save you 16% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap Boston to St. Louis flights in June & July 2024

Find cheap flight options from Boston to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 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.
Fri 7/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mFrontier
Deal found 6/6$159
Fri 7/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mFrontier
Deal found 6/5$160
Tue 7/26:10 amBOS - STL
1 stop9h 13mMultiple Airlines
Sat 7/63:09 pmSTL - BOS
1 stop8h 18mMultiple Airlines
Deal found 6/4$190
Wed 6/125:45 amBOS - STL
1 stop7h 16mDelta
Tue 6/186:00 amSTL - BOS
1 stop7h 17mDelta
Deal found 6/5$196
Tue 7/96:10 amBOS - STL
1 stop9h 13mMultiple Airlines
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mMultiple Airlines
Deal found 6/5$202
Thu 7/111:07 pmBOS - STL
1 stop7h 52mMultiple Airlines
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mMultiple Airlines
Deal found 6/5$207
Wed 6/199:16 amBOS - STL
1 stop22h 51mFrontier
Sun 6/237:44 pmSTL - BOS
1 stop11h 32mFrontier
Deal found 6/5$209
Mon 7/89:26 amBOS - STL
1 stop24h 10mFrontier
Fri 7/127:33 pmSTL - BOS
1 stop12h 55mFrontier
Deal found 6/5$210
Thu 6/206:30 amBOS - STL
2 stops30h 15mMultiple Airlines
Mon 6/242:00 pmSTL - BOS
2 stops33h 38mMultiple Airlines
Deal found 6/4$215

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 3,050,429 searches. Data last updated June 6, 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.
Wed 9/1812:09 pmBOS - STL
1 stop29h 11mSpirit Airlines
Tue 9/245:20 pmSTL - BOS
1 stop16h 54mSpirit Airlines
Deal found 6/6$146
Fri 7/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mFrontier
Deal found 6/6$159
Fri 7/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Mon 7/159:32 pmSTL - BOS
1 stop11h 36mFrontier
Deal found 6/5$160
Sat 9/76:10 amBOS - STL
1 stop11h 10mSpirit Airlines
Wed 9/117:57 amSTL - BOS
1 stop6h 22mSpirit Airlines
Deal found 6/5$163
Wed 9/1812:09 pmBOS - STL
1 stop29h 11mSpirit Airlines
Mon 9/237:57 amSTL - BOS
1 stop6h 22mSpirit Airlines
Deal found 6/6$172
Wed 9/185:27 pmBOS - STL
1 stop25h 03mSpirit Airlines
Wed 9/254:31 pmSTL - BOS
1 stop17h 36mSpirit Airlines
Deal found 6/4$177
Tue 9/176:10 amBOS - STL
1 stop11h 10mMultiple Airlines
Fri 9/206:42 pmSTL - BOS
1 stop13h 31mMultiple Airlines
Deal found 6/5$183
Tue 7/26:10 amBOS - STL
1 stop9h 13mMultiple Airlines
Sat 7/63:09 pmSTL - BOS
1 stop8h 18mMultiple Airlines
Deal found 6/4$190
Wed 6/125:45 amBOS - STL
1 stop7h 16mDelta
Tue 6/186:00 amSTL - BOS
1 stop7h 17mDelta
Deal found 6/5$196

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 3,050,429 searches. Data last updated June 6, 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.
Wed 6/125:45 amBOS - STL
1 stop7h 16mDelta
Tue 6/186:00 amSTL - BOS
1 stop7h 17mDelta
Deal found 6/5$196
Wed 6/128:00 amBOS - STL
1 stop7h 14mUnited Airlines
Thu 6/136:08 amSTL - BOS
1 stop7h 08mUnited Airlines
Deal found 6/5$249
Thu 6/136:10 amBOS - STL
1 stop12h 18mSpirit Airlines
Thu 6/138:12 pmSTL - BOS
1 stop15h 51mSpirit Airlines
Deal found 6/5$260
Thu 6/136:10 amBOS - STL
1 stop12h 18mSpirit Airlines
Tue 6/1811:57 amSTL - BOS
2 stops34h 03mSpirit Airlines
Deal found 6/5$264
Tue 6/116:30 amBOS - STL
2 stops30h 15mMultiple Airlines
Thu 6/133:55 pmSTL - BOS
2 stops31h 43mMultiple Airlines
Deal found 6/5$277
Thu 6/136:30 amBOS - STL
2 stops10h 45mMultiple Airlines
Thu 6/138:12 pmSTL - BOS
1 stop14h 05mMultiple Airlines
Deal found 6/5$281
Fri 6/146:30 amBOS - STL
2 stops30h 15mMultiple Airlines
Tue 6/1811:57 amSTL - BOS
3 stops26h 40mMultiple Airlines
Deal found 6/5$291
Fri 6/146:30 amBOS - STL
2 stops30h 15mMultiple Airlines
Tue 6/1811:57 amSTL - BOS
2 stops25h 28mMultiple Airlines
Deal found 6/5$297
Tue 6/116:30 amBOS - STL
2 stops30h 15mMultiple Airlines
Thu 6/133:55 pmSTL - BOS
3 stops24h 52mMultiple Airlines
Deal found 6/5$302

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 3,050,429 searches. Data last updated June 6, 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.
Wed 8/148:15 amBOS - STL
1 stop7h 27mFrontier
Deal found 6/5$55
Wed 8/289:16 amBOS - STL
1 stop22h 46mFrontier
Deal found 6/4$60
Wed 7/178:27 pmBOS - STL
1 stop22h 02mSpirit Airlines
Deal found 6/5$73
Mon 7/86:00 amBOS - STL
1 stop15h 42mFrontier
Deal found 6/6$78
Mon 8/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Deal found 6/4$82
Wed 6/263:42 pmBOS - STL
2 stops26h 46mSpirit Airlines
Deal found 6/4$84
Wed 8/712:32 pmBOS - STL
1 stop9h 10mFrontier
Deal found 6/6$85
Fri 7/1212:32 pmBOS - STL
1 stop9h 10mFrontier
Deal found 6/5$86
Mon 6/249:19 pmBOS - STL
2 stops14h 38mSpirit Airlines
Deal found 6/6$93

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 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$146 - $315

Route

Depart

Return

Price

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 9/18

1 stop29h 11m

Lambert-St Louis

Tue 9/24

1 stop16h 54m

$146

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 7/31

1 stop9h 10m

Lambert-St Louis

Sat 8/3

1 stop8h 18m

$158

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 7/12

1 stop9h 10m

Lambert-St Louis

Mon 7/15

1 stop11h 36m

$159

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 9/7

1 stop11h 10m

Lambert-St Louis

Wed 9/11

1 stop6h 22m

$162

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 9/17

1 stop11h 10m

Lambert-St Louis

Fri 9/20

1 stop13h 31m

$183

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 7/1

1 stop8h 14m

Lambert-St Louis

Wed 7/3

1 stop8h 00m

$270

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 6/18

1 stop5h 56m

Lambert-St Louis

Tue 7/9

1 stop6h 21m

$281

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 7/4

1 stop4h 48m

Lambert-St Louis

Thu 7/11

1 stop7h 08m

$294

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 10/10

1 stop24h 05m

Lambert-St Louis

Sun 10/13

1 stop15h 10m

$315

Flights are sorted by cheapest first

Deals found on 6/6

How far ahead should I 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 May 31, 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

What is the cheapest day 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 June 2, 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

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

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

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 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 June 6, 2024.
Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and United 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.
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.2
Very good
5,918 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

8.1
Very good
9,222 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

8.0
Very good
10,368 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

7.4
Good
10,696 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

7.3
Good
14,227 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

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 Spirit Airlines for just $146, but on average you can expect to pay $181.

  • 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 $365.

  • 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 $146. Another airline that can offer you cheap pricing is Frontier. Spirit Airlines 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 Frontier, with whom users have recently found tickets for as low as $55. However, be on the lookout for offers from Spirit Airlines and Delta, as they are both options that can get you from Boston to St. Louis for a low price.

  • 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: Republic Airways (100%), Qatar Airways (90%), American Airlines (89%).

  • 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 $130 on average our data indicates $337 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.

  • Can I find deals for flights from Boston to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Boston to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Boston to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Boston to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston 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.

  • Can I find deals for flights from Boston to St. Louis that allow pets onboard?

    Many airlines flying from Boston to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Boston to St. Louis?

    Yes, you can often find last-minute deals on Boston to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Boston to St. Louis flight deals updated?

    The Boston to St. Louis flight deals you see on this page were last updated on 6/6.

  • What are the most popular airlines that fly from Boston to St. Louis?

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

    Currently, September is the cheapest month in which you can book a flight from Boston to St. Louis (average of $318). Flying from Boston to St. Louis in July is currently the most expensive (average of $365). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$103Average$197FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$146Average$237FlexibilityNo cancel feeOn-time65%
DeltaCheapest$197Average$406FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$282Average$446FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$313Average$509FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$366Average$535FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$442Average$519FlexibilityNo cancel feeOn-time62%

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 June 6, 2024.
1%of flight departuresEarly morningMidnight to 6 am
55%of flight departuresMorning6 am to noon
44%of flight departuresAfternoonNoon to 6 pm
0%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 June 6, 2024.
Sunday7daily flights
Monday6daily flights
Tuesday6daily flights
Wednesday6daily flights
Thursday6daily flights
Friday6daily flights
Saturday3daily flights
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