
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $350 (American Airlines) |
One-way from | $82 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $480 |
Good round-trip deal | $439 or less |
Good one-way deal | $230 or less |
Fly from
Fly to
Route
Depart
Return
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Mon 6/1
3:00 pm-8:39 pm
1 stop6h 39m
Lambert-St Louis
Wed 6/3
6:04 pm-11:29 pm
1 stop4h 25m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 5/28
5:40 am-7:40 am
Nonstop3h 00m
Lambert-St Louis
Sat 5/30
6:20 am-1:35 pm
1 stop6h 15m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 6/25
1:20 pm-8:50 pm
2 stops8h 30m
Lambert-St Louis
Tue 6/30
3:15 pm-11:20 pm
2 stops7h 05m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 7/28
5:50 am-7:45 am
Nonstop2h 55m
Lambert-St Louis
Tue 8/4
6:40 pm-10:15 pm
Nonstop2h 35m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Sat 7/18
5:50 am-7:45 am
Nonstop2h 55m
Lambert-St Louis
Tue 7/21
7:10 pm-10:40 pm
Nonstop2h 30m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 5/27
7:30 am-3:46 pm
2 stops9h 16m
Lambert-St Louis
Wed 6/3
7:22 am-4:29 pm
1 stop8h 07m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 5/28
5:40 am-7:40 am
Nonstop3h 00m
Lambert-St Louis
Fri 5/29
2:30 pm-6:05 pm
Nonstop2h 35m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Mon 6/1
5:40 am-7:40 am
Nonstop3h 00m
Lambert-St Louis
Thu 6/4
7:55 pm-11:25 pm
Nonstop2h 30m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Sat 6/13
9:20 am-11:15 am
Nonstop2h 55m
Lambert-St Louis
Sun 7/5
8:00 pm-11:30 pm
Nonstop2h 30m
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 6/25
5:20 pm-11:10 pm
1 stop6h 50m
Lambert-St Louis
Sat 6/27
8:45 pm-12:15 am
Nonstop2h 30m
| 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 Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from Boston to St. Louis, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, August is the cheapest month in which you can book a flight from Boston to St. Louis (average of $381). Flying from Boston to St. Louis in March is currently the most expensive (average of $528). 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.
It’s typically best to fly out from Boston to St. Louis in the evening. Doing so could potentially save you 8% on the flight price compared to flying at noon, which is usually more expensive.
Travelers seeking maximum savings on their Boston to St. Louis flight should consider departing on Thursday 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.
About 19% of weekly flights between Boston and St. Louis have experienced delays in the past year, with the average delay time being 139 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, American Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Boarding
Crew
Food
Overall
Entertainment
Reviews
Dominic,Mar 2026
MCO - SMF
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$207 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$90 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$437 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$285 | Average$475 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$314 | Average$481 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$327 | Average$430 | FlexibilityNo cancel fee | On-time62% |