
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $335 (Southwest) |
One-way from | $127 (Frontier) |
Popular in | February |
Cheapest in | September |
Average price | $441 |
Good round-trip deal | $461 or less |
Good one-way deal | $252 or less |
Fly from
Fly to
Route
Depart
Return
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Thu 5/28
7:40 pm-11:10 pm
Nonstop2h 30m
Boston Logan Intl
Mon 6/1
5:40 am-7:40 am
Nonstop3h 00m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 9/16
10:45 am-6:35 pm
2 stops6h 50m
Boston Logan Intl
Sat 9/19
1:30 pm-3:20 pm
Nonstop2h 50m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 9/30
1:20 pm-4:55 pm
Nonstop2h 35m
Boston Logan Intl
Sun 10/4
5:25 am-7:25 am
Nonstop3h 00m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 6/10
5:40 am-10:55 am
1 stop4h 15m
Boston Logan Intl
Mon 6/15
5:35 am-7:25 am
Nonstop2h 50m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Tue 6/2
5:29 pm-1:14 am
1 stop6h 45m
Boston Logan Intl
Wed 6/3
6:00 am-12:11 pm
1 stop7h 11m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 7/8
6:58 pm-1:20 am
1 stop5h 22m
Boston Logan Intl
Sat 7/11
5:30 am-9:31 am
1 stop5h 01m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Tue 7/14
11:25 am-5:31 pm
1 stop5h 06m
Boston Logan Intl
Wed 7/22
10:35 am-3:46 pm
1 stop6h 11m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Thu 7/16
5:35 pm-12:10 am
1 stop5h 35m
Boston Logan Intl
Tue 7/21
6:25 pm-8:30 pm
Nonstop3h 05m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Thu 10/29
6:00 am-9:35 am
Nonstop2h 35m
Boston Logan Intl
Sun 11/1
5:20 am-7:25 am
Nonstop3h 05m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 5/20
10:15 am-1:50 pm
Nonstop2h 35m
Boston Logan Intl
Wed 5/20
5:55 pm-8:00 pm
Nonstop3h 05m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars |
The best time to book flights from St. Louis to Boston is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, September is the cheapest month in which you can book a flight from St. Louis to Boston (average of $382). Flying from St. Louis to Boston in February is currently the most expensive (average of $659). 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.
A simple way to save on the total cost of your ticket is to fly from St. Louis to Boston in the evening. If you’re flexible enough to do this you can expect to save up to 54% on your trip compared to booking a flight at noon.
Travelers seeking maximum savings on their St. Louis to Boston flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Boarding
Comfort
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$249 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$118 | Average$296 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$125 | Average$200 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$254 | Average$477 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$270 | Average$443 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$304 | Average$478 | FlexibilityNo cancel fee | On-time63% |