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

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The best prices from St Louis to Boston are usually found in January or July, booked 55 days in advance, depart on a Thursday or Sunday and return on a Thursday

How to find the cheapest flight from
St Louis (STL) to Boston (BOS)

All the information you need to plan the best STL to BOS flight in 2021: compare St Louis to Boston flight prices with the expected peak season, weather and rainfall in Boston.
STL - BOS
Price
$188 - $284
BOS
Temperature
39.2 - 84.2 °F
BOS
Rainfall
2.8 - 3.9 inches

Popular in

December

High demand for flights, 22% potential price rise

Cheapest in

January

Best time to find cheap flights, 15% potential price drop

Round-trip from

$188

From St Louis to Boston

One-way from

$108

One-way flight from St Louis to Boston

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St Louis to Boston?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 7% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St Louis to Boston?

Travelers have found it’s best to book a flight 20 days in advance to save up to 25% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 20 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St Louis to Boston 1-2 weeks in advance for as low as $185, or $243 for flights within the next 24 hours.

What is the cheapest month to fly from St Louis to Boston?

August is one of the best times of the year to fly to Boston from St Louis. Prices for August average $206 per person but you can even find prices for as low as $50. The most expensive prices can be found in the month of December. Opting for a August flight can save you 39% on your journey compared to booking in August

When is the cheapest time to fly from St Louis to Boston (STL - BOS)?

It’s optimal to fly from St Louis to Boston at noon. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight in the morning.

Cheap flights from St Louis to Boston in June, July 2021

The best prices found for STL to BOS flights for June, July
17 Jun - 22 Jun
$206pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
   
2 STOPS
STL
Lambert-St Louis
24 Jun - 28 Jun
$215pp
STL
Lambert-St Louis
Spirit Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
21 Jun - 20 Jul
$219pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

St Louis to Boston 2021 flight deals

Cheap flights to Boston from St Louis found for this year
24 Sep - 27 Sep
$199pp
STL
Lambert-St Louis
Delta
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
 
1 STOP
STL
Lambert-St Louis
17 Jun - 22 Jun
$206pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
   
2 STOPS
STL
Lambert-St Louis
24 Jun - 28 Jun
$215pp
STL
Lambert-St Louis
Spirit Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Boston from St Louis

Save time with St Louis to Boston direct flight deals
5 Nov - 10 Nov
$327pp
STL
Lambert-St Louis
JetBlue
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
JetBlue
Non-Stop
STL
Lambert-St Louis
23 Nov - 26 Nov
$346pp
STL
Lambert-St Louis
JetBlue
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
JetBlue
Non-Stop
STL
Lambert-St Louis
23 Nov - 26 Nov
$355pp
STL
Lambert-St Louis
JetBlue
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
JetBlue
Non-Stop
STL
Lambert-St Louis

Last minute flights from St Louis to Boston

Late deals on round-trip flights to Boston from St Louis, departing today and this week
24 Jun - 28 Jun
$215pp
STL
Lambert-St Louis
Spirit Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
25 Jun - 29 Jun
$239pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
25 Jun - 29 Jun
$247pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to Boston from St Louis

The cheapest one-way flights from St Louis to Boston
3:05 am - 7:53 pm
American Airlines
1 Stop
15h 48m
STL - BOS
American Airlines
11:26 am - 6:25 am
Frontier
2 Stops
41h 59m
STL - BOS
Frontier
$146
Kiwi.com
4:10 pm - 6:28 am
Spirit Airlines
1 Stop
13h 18m
STL - BOS
Spirit Airlines
$152
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St Louis</span> to <span class="emphasized">Boston</span> flights.

Flight FAQs

From St Louis to Boston

Are flight prices decreasing from St Louis to Boston due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Boston for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from Lambert-St Louis to Boston Logan Intl have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to Boston Logan Intl have new flexible policies in place due to COVID-19. American Airlines, Delta, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

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 is 1 flight from Lambert-St Louis to Logan Intl, all of which are around 2h 35m 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.

Can I find flights from St Louis to Boston for under $200 on Cheapflights?

Yes, there are multiple flights from St Louis to Boston for under $200. The cheapest flight booked recently is on Delta for just $199, but on average you can expect to pay $239.

Are there nonstop flights from St Louis to Boston for under $400 on Cheapflights?

Cheapflights has at least 5 direct flights from St Louis to Boston under $400. A good price for a nonstop flight from St Louis to Boston is less than $399.

Are there last-minute flights available from St Louis to Boston for under $300?

There are currently 20+ open flights from St Louis to Boston within the next 7 days for less than $300.

How popular is this flight route?

Within the past month, 51 users have taken a look at flights from Lambert-St Louis to Boston Logan Intl.

Does it rain more in St Louis or Boston?

St Louis will have the same amount of rainfall in 1 compared to Boston over the next 14 days.

Is St Louis weather warmer or cooler than Boston?

You can imagine temperatures to be in the 90 °F range in July. The weather in Boston is generally colder than St Louis's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from St Louis to Boston?

Airlines like Delta, United Airlines, and American Airlines fly from St Louis to Boston in about 4h 44m. The time it takes to get you to your destination can typically vary by up to 21m. This flight may include one or multiple stops.

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

Delta, at $199, was found to be the cheapest airline from St Louis to Boston.Alternate airlines to your destination round-trip include Spirit Airlines and United Airlines. Delta is priced at 10% lower than the current average price of a flight leaving 3 months from now.

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

The cheapest airlines for a one-way flight from St Louis to Boston are Frontier ($100), Spirit Airlines ($103), and American Airlines ($108).

Alternative routes for St Louis to Boston

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Boston

Things to know before you go - useful duration and weather info for your trip from St Louis to Boston.
Average temperature for June in Boston
78.8 °F
Avg rainfall for June in Boston
3.1 ″

Airports servicing St. Louis

Airports servicing Boston

Top 5 airlines flying from St Louis to Boston

The chart below displays the airlines Cheapflights users traveling from St Louis to Boston choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$111 $211 No cancel fee 62%
United Airlines
$92 $257 No cancel fee 69%
Delta
$101 $257 No cancel fee N/A
American Airlines
$92 $260 No cancel fee 71%
Southwest
$229 $560 No cancel fee 63%

Hourly flight availability from St Louis to Boston

See what time of day planes typically take off from St Louis towards Boston.
Morning 6 AM to noon 50% of STL to BOS departures
Afternoon Noon to 6 PM 50% of STL to BOS departures
Early morning Midnight to 6 AM 0% of STL to BOS departures
Evening 6 PM to midnight 0% of STL to BOS departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to Boston
See how many times per day planes take to the skies headed from St Louis to Boston.
Sunday
0 flights
Monday
2 daily flights
Tuesday
2 daily flights
Wednesday
2 daily flights
Thursday
2 daily flights
Friday
2 daily flights
Saturday
0 flights
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