Expect security screening at STL to take 5-10 minutes during off-peak times. Check real-time wait times online before heading to the airport.
Round-trip from | $290 (Mytrip) |
---|---|
One-way from | $162 (Mytrip) |
Popular in | July |
Cheapest in | September |
Average price | $433 |
Good round-trip deal | $365 or less |
Good one-way deal | $210 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Thu 7/3
6:36 pm-8:39 am
1 stop13h 03m
Boston Logan Intl
Sun 7/6
8:03 pm-6:18 pm
1 stop23h 15m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Fri 6/20
11:28 am-10:56 pm
1 stop10h 28m
Boston Logan Intl
Fri 6/27
9:40 am-11:53 pm
1 stop15h 13m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Tue 9/9
5:55 am-3:06 pm
1 stop8h 11m
Boston Logan Intl
Fri 9/12
4:10 pm-6:15 pm
Nonstop3h 05m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Wed 7/9
2:50 pm-6:25 pm
Nonstop2h 35m
Boston Logan Intl
Wed 7/16
7:00 pm-9:05 pm
Nonstop3h 05m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Sat 8/16
6:40 am-6:37 pm
1 stop10h 57m
Boston Logan Intl
Wed 8/20
5:15 am-8:33 pm
1 stop16h 18m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Tue 8/5
8:00 am-11:32 pm
1 stop14h 32m
Boston Logan Intl
Wed 8/6
6:07 am-3:47 pm
1 stop10h 40m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Thu 7/17
8:44 pm-10:57 am
1 stop13h 13m
Boston Logan Intl
Mon 7/21
10:18 am-11:47 pm
2 stops14h 29m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Sat 7/26
3:34 pm-3:43 pm
2 stops23h 09m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Mon 8/4
10:47 am-7:34 pm
3 stops31h 47m
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Sat 8/2
5:30 pm-11:12 pm
1 stop4h 42m
The best time to book flights from St. Louis to Boston is 84 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, January is the cheapest month in which you can book a flight from St. Louis to Boston (average of $218). Flying from St. Louis to Boston in June is currently the most expensive (average of $306). 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 afternoon. If you’re flexible enough to do this you can expect to save up to 61% 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 afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.
If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Boarding
Crew
Entertainment
Food
Overall
Comfort
Reviews
John,May 2025
PVD - BNA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$100 | Average$200 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$168 | Average$228 | FlexibilityNo cancel fee | On-time65% | |
Cheapest$196 | Average$377 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$196 | Average$288 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$267 | Average$422 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$318 | Average$451 | FlexibilityNo cancel fee | On-time63% |