Cheap flights from St. Louis to Boston from $69
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Boston departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from St. Louis to Boston
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Spirit Airlines flights from St. Louis to Boston
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How to get the cheapest flight ticket from St. Louis to Boston
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Boston?
In general, September is the cheapest month to fly from St. Louis to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $380. If you aren’t able to travel during the month of September, then book flights to Boston from St. Louis during August instead. Flights to Boston in August, while not as cheap as those in September, still average around $382.
What is the cheapest day to depart on your flight to Boston?
The cheapest day to depart from St. Louis to Boston is on a Thursday when prices can be found for as low as $486. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Saturday is $811.
What is the cheapest time of day to depart on your flight to Boston?
According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from St. Louis to Boston in the afternoon for as low as $421. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. At noon is when there is more demand to fly to Boston, so prices are often more expensive at around $1,072 per ticket.
What is the cheapest Lambert-St Louis to Boston Logan Intl flight route?
Fly from Lambert-St Louis to Boston Logan Intl for the best Lambert-St Louis - Boston Logan Intl flight prices
How far in advance should I book a flight to Boston?
You are more likely to see cheaper flights to Boston from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $421 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from St. Louis for as low as $353 on momondo.
What cabin class options are available on Lambert-St Louis to Boston Logan Intl flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to Boston Logan Intl?
Spirit Airlines, Frontier, and American Airlines are the most popular carriers operating from Lambert-St Louis to Boston Logan Intl
What airlines fly to Boston?
American Airlines, Southwest and Delta are the top three most popular airlines that fly to Boston from St. Louis according to our data. American Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Boston. Keep in mind that there are 6 different airlines that fly to Boston on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Boston on average per day?
2 flights are operational daily from St. Louis to Boston as of July 2025. The most popular departure time for this route is 10:00AM, with 60% of flights per day taking off at noon.
How many flights depart from St. Louis to Boston on average per week?
As of July 2025, there are 20 flights per week flying from St. Louis to Boston. The most common day of the week flights depart is Thu, with 35% of flights taking off on this day.
When to book flights from St. Louis to Boston
Cheap St. Louis to Boston (STL to BOS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Boston
How far is Lambert-St Louis to Boston Logan Intl by plane?
Boston Logan Intl is 1035.0 mi away from Lambert-St Louis. By plane, this route typically takes 7h 03m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Boston Logan Intl Airport?
Prices for flights from Lambert-St Louis Airport to Boston Logan Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Boston Logan Intl Airport?
As of July 2025, there are 6 operators available to choose from for flights from Lambert-St Louis Airport to Boston Logan Intl Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Boston Logan Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Boston Logan Intl Airport.
What documentation or ID do you need to fly to Boston Logan Intl Airport?
The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from St. Louis to Boston?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Boston is Embraer 175, representing 36.20% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 24.83%, Boeing 737-700 Passenger/BBJ1 (winglets) at 20.34%, and Boeing 737 MAX 8 at 17.10%.
What is the most popular airline from St. Louis to Boston?
Based on momondo bookings for flights between St. Louis and Boston, the leading airline is American Airlines, making up 62% of the total bookings. Other popular airlines include Southwest with 26%, Delta with 5%, and Frontier with 3%.
Best airlines flying from St. Louis to Boston
Compare and see reviews for airlines that fly from St. Louis to Boston with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $105 | Free Cancellation | Rating 5.9 3,284 reviews | |||
| PriceFrom $153 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $168 | Free Cancellation | Rating 6.3 8,094 reviews | |||
| PriceFrom $196 | Free Cancellation | Rating 8.0 7,983 reviews | |||
| PriceFrom $269 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $311 | Free Cancellation | Rating 8.0 4,270 reviews |
Southwest Flights From St. Louis to Boston
The lowest priced Southwest flight from St. Louis to Boston from the last 72 hours was $311. Generally, Southwest has 14 flights on this route every week with an average price of $451. Southwest is rated 8.0/10 by our users.
American Airlines Flights From St. Louis to Boston
The best American Airlines deal for St. Louis to Boston flight tickets found on momondo in the last 72 hours was $269, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $423 round-trip. American Airlines operates 2 flights out of St. Louis into Boston in an average week, so prices vary by time and availability. 10,000 American Airlines reviews by users on momondo have scored the airline at 7.2/10.
Traveling to a place near Boston?
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Why should I use momondo to find a flight deal from St. Louis to Boston?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Boston. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from St. Louis to Boston with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Boston from St. Louis with this policy.
How can momondo help me find flights from St. Louis to Boston?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Boston from St. Louis.
I’m not ready to book a flight from St. Louis to Boston right now. Can momondo alert me if prices change?
Price alerts on flights to Boston from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.