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CA $208 Cheap Flights from Boston (BOS) to St. Louis (STL)

View CA $208 flight on Sat, Sep 26, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Lambert-St. Louis International Airport (STL)

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

Prices were available within the past 7 days and start at CA $208 for one-way flights and CA $510 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Sep 5 - Mon, Sep 21
BOS
Boston
STL
St. Louis
CA $510 Roundtrip, found 5 days ago
CA $510
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Sep 5 from Boston to St. Louis, returning Mon, Sep 21, priced at CA $510 found 5 days ago
Delta
Sat, Sep 5 - Fri, Sep 18
BOS
Boston
STL
St. Louis
CA $520 Roundtrip, found 5 days ago
CA $520
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Sep 5 from Boston to St. Louis, returning Fri, Sep 18, priced at CA $520 found 5 days ago
Delta
Wed, Sep 9 - Mon, Sep 21
BOS
Boston
STL
St. Louis
CA $547 Roundtrip, found 5 days ago
CA $547
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Sep 9 from Boston to St. Louis, returning Mon, Sep 21, priced at CA $547 found 5 days ago
Delta
Wed, Sep 9 - Fri, Sep 18
BOS
Boston
STL
St. Louis
CA $556 Roundtrip, found 5 days ago
CA $556
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Sep 9 from Boston to St. Louis, returning Fri, Sep 18, priced at CA $556 found 5 days ago
Delta
Fri, Aug 28 - Fri, Sep 11
BOS
Boston
STL
St. Louis
CA $561 Roundtrip, found 5 days ago
CA $561
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Aug 28 from Boston to St. Louis, returning Fri, Sep 11, priced at CA $561 found 5 days ago
Delta
Tue, Sep 22 - Tue, Sep 29
BOS
Boston
STL
St. Louis
CA $564 Roundtrip, found 2 days ago
CA $564
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Sep 22 from Boston to St. Louis, returning Tue, Sep 29, priced at CA $564 found 2 days ago
Delta
Sat, Sep 5 - Sun, Sep 20
BOS
Boston
STL
St. Louis
CA $582 Roundtrip, found 5 days ago
CA $582
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Sep 5 from Boston to St. Louis, returning Sun, Sep 20, priced at CA $582 found 5 days ago
American Airlines
Fri, Sep 25 - Sun, Sep 27
BOS
Boston
STL
St. Louis
CA $598 Roundtrip, found 2 days ago
CA $598
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Sep 25 from Boston to St. Louis, returning Sun, Sep 27, priced at CA $598 found 2 days ago
Southwest Airlines
Fri, Sep 25 - Sun, Sep 27
BOS
Boston
STL
St. Louis
CA $612 Roundtrip, found 2 days ago
CA $612
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Fri, Sep 25 from Boston to St. Louis, returning Sun, Sep 27, priced at CA $612 found 2 days ago
United
Mon, Sep 28 - Tue, Sep 29
BOS
Boston
STL
St. Louis
CA $684 Roundtrip, found 2 days ago
CA $684
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 28 from Boston to St. Louis, returning Tue, Sep 29, priced at CA $684 found 2 days ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from CA $646
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $646

Frequently asked questions

How much does a flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from CA $208 and cheap return flights from CA $510 BOS to STL with Expedia. One-way flights typically cost between CA$348 and CA$889. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when BOS to STL ticket fares go up or down.
What is the cheapest month to fly from Boston, MA (BOS) to St. Louis, MO (STL)?
The cheapest months to fly from Boston, MA (BOS) to St. Louis, MO (STL) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are 2 airlines offering direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Here are the carriers:
  • Southwest Airlines operates 21 direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
  • American Airlines operates 17 direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
What is the cheapest airline that flies from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Frontier Airlines offers one of the cheapest connecting return flights on this route, with prices starting from around CA$221. Louis Intl.), with prices starting from around CA$337 for flights that can be booked for departure within the next year. Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. American Airlines offers the most daily flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Boston, MA (BOS) to St. Louis, MO (STL)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find approximately 5 nonstop flights per day from Boston Logan International (BOS) to St. Louis Lambert International (STL). For even more choices, look at flights that include layovers, as there are around 140 connecting flights per day. Some common connection points include O'Hare International (ORD), Seattle - Tacoma International (SEA), and Portland International (PDX).
What is the earliest flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs around 5:00 AM. This service is offered by American Airlines and Southern Airways. This is a seasonal service, active in June, July, August, and September. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll typically find the most flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) on a Thursday, with around 89 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Delta, and United. Flight schedules are quite consistent throughout the week, with only a slight variation in the number of flights on other days.
What are the most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) are in the afternoon, from 3pm to 6pm. Many major carriers, including American Airlines, Delta and Southwest Airlines, offer flights during this window. Many travelers prefer this because it allows for a productive morning before heading to the airport and an evening arrival in St. Louis.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 3 hours 18 minutes, covering a distance of approximately 1,680 kilometers. If you opt for a flight with one stop, your journey will usually be longer, taking about 5 hours 48 minutes. Flights with two or more stops will extend your travel time further, to around 8 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Yes, you can fly business class or first class between BOS and STL. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, Spirit Airlines, Delta, United, and American Airlines.
How do I earn miles on a Boston, MA (BOS) to St. Louis, MO (STL) flight with Expedia?
It's easy to earn miles on a Boston, MA (BOS) to St. Louis, MO (STL) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis, MO (STL) from Boston, MA (BOS)?
If you're planning to travel to St. Louis from Logan International Airport (BOS), you can fly directly into Lambert-St. Louis International Airport (STL). Some flights may connect through major hubs like Portland International Airport (PDX), Baltimore Washington International Thurgood Marshall Airport (BWI), or Seattle - Tacoma International Airport (SEA) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Boston, MA (BOS) to St. Louis, MO (STL) at the last minute?
Typically, booking a last minute flight from Boston, MA (BOS) to St. Louis, MO (STL) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boston, MA (BOS) to St. Louis, MO (STL) flight and hotel package?
Securing a Boston, MA (BOS) to St. Louis, MO (STL) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Logan Intl.
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
CA $510
Distance
1669 km
Average flight time
1 hour 51 mins

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Boston to St. Louis Flights

The easy way to book your flights from Boston to St. Louis 

With Expedia, it’s simple to find and book flights to St. Louis from Boston whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Lambert-St. Louis Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Boston to St. Louis today, tomorrow, or this week.  

 

Save dollars with cheap flights from Logan Intl., BOS to Lambert-St. Louis Intl., STL 

Sort your search results by price to find great deals on your flight from Boston to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Boston currently is just CA $510 rising to CA $684.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to St. Louis  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to St. Louis from Boston 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Louis with Expedia today.

Boston to St. Louis Flights

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