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 Tuesday and return on a Thursday

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

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

$105

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 in the evening. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the afternoon.

Cheap flights from St Louis to Boston in February, March 2021

24 Mar - 30 Mar
$88pp
STL
Lambert-St Louis
Frontier
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
21 Mar - 30 Mar
$105pp
STL
Lambert-St Louis
Frontier
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
31 Mar - 4 Apr
$144pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

St Louis to Boston 2021 flight deals

24 Mar - 30 Mar
$88pp
STL
Lambert-St Louis
Frontier
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
21 Mar - 30 Mar
$105pp
STL
Lambert-St Louis
Frontier
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
31 Mar - 4 Apr
$144pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

Last minute flights from St Louis to Boston

5 Mar - 8 Mar
$190pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
   
2 STOPS
STL
Lambert-St Louis
5 Mar - 8 Mar
$215pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
     
3 STOPS
STL
Lambert-St Louis
5 Mar - 8 Mar
$228pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to Boston from St Louis

4:45 pm - 5:23 am
Frontier
2 Stops
35h 38m
STL - BOS
Frontier
$105
Kiwi.com
2:20 am - 12:45 pm
Major Airline
1 Stop
9h 25m
STL - BOS
Major Airline
$123
StudentUniverse
2:00 am - 9:21 am
Delta
1 Stop
6h 21m
STL - BOS
Delta
$140
Delta

Related info for your journey

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.

What safety measures are being taken by airlines flying from Lambert-St Louis to Boston Logan Intl to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Lambert-St Louis to Boston Logan Intl are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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.

Can I find flights from St Louis to Boston for under $100 on Cheapflights?

Yes, there are multiple flights from St Louis to Boston for under $100. The cheapest flight booked recently is on Frontier for just $88, but on average you can expect to pay $153.

Are there nonstop flights from St Louis to Boston for under $100 on Cheapflights?

There are no nonstop flights from St Louis to Boston, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to Boston for under $200?

There are currently 20+ open flights from St Louis to Boston within the next 7 days for less than $200.

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 less rainfall in 2 compared to Boston over the next 12 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 Frontier and Major Airline fly from St Louis to Boston in about 7h 17m. The time it takes to get you to your destination can typically vary by up to 6h 28m. This flight may include one or multiple stops.

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

Frontier, at $88, was found to be the cheapest airline from St Louis to Boston. An alternate airline flying to your destination would be Major Airline. Frontier is priced at 60% 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 ($50), Major Airline ($123), and Delta ($140).

Alternative routes for St Louis to Boston

Destination information for Boston

Average temperature for February in Boston
41.0 °F
Avg rainfall for February in Boston
2.8 ″

Airports servicing St. Louis

Airports servicing Boston

Top 5 airlines flying from St Louis to Boston

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%
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