
Round-trip from | $531 (Cheapflightsfares) |
|---|---|
One-way from | $278 (Kiwi.com) |
Popular in | June |
Cheapest in | August |
Average price | $786 |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 11/7
3:59 pm-4:00 pm
2 stops18h 01m
London Heathrow
Sun 11/9
6:40 am-11:39 pm
3 stops22h 59m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 9/4
1:21 pm-9:40 pm
2 stops26h 19m
London Heathrow
Tue 9/16
6:40 am-10:00 pm
2 stops21h 20m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 10/2
1:26 pm-5:40 pm
2 stops22h 14m
London Heathrow
Thu 10/9
6:40 am-11:41 pm
2 stops23h 01m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sat 10/11
1:30 pm-5:40 pm
2 stops22h 10m
London Heathrow
Sat 10/25
6:40 am-10:04 pm
2 stops21h 24m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sat 9/27
3:55 pm-5:40 pm
2 stops19h 45m
London Heathrow
Fri 10/3
6:40 am-9:15 pm
2 stops20h 35m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 10/24
3:59 pm-1:35 pm
2 stops15h 36m
London Heathrow
Sat 11/1
6:40 am-10:04 pm
2 stops20h 24m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 10/2
1:26 pm-4:00 pm
2 stops20h 34m
London Heathrow
Mon 10/6
6:40 am-11:41 pm
2 stops23h 01m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sun 9/21
4:05 pm-10:00 am
1 stop11h 55m
London Heathrow
Tue 10/7
2:05 pm-7:57 pm
1 stop11h 52m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Mon 10/20
7:52 pm-10:00 pm
3 stops44h 08m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sat 10/18
7:52 pm-10:00 pm
3 stops44h 08m
To ensure you get the cheapest price possible for a flight from St. Louis to London Heathrow Airport, you should look to book at least 34 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, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $661). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.
One of the essential ways to save on airfare from St. Louis to London Heathrow Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.
Chicago (ORD) – chosen by Cheapflights users on 57% of 1-stop itineraries from St. Louis to London Heathrow Airport on Cheapflights.
Frankfurt am Main (FRA) is the most affordable 1-stop option, with an average round-trip price of $797.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 10h 06m.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 31m.
Crew
Boarding
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Food
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Thomas,Mar 2025
SFO - TPE
Crew
Boarding
Comfort
Food
Overall
Entertainment
Reviews
Thomas,Mar 2025
SFO - TPE
Crew
Boarding
Comfort
Food
Overall
Entertainment
Reviews
Thomas,Mar 2025
SFO - TPE
Crew
Boarding
Comfort
Food
Overall
Entertainment
Reviews
Thomas,Mar 2025
SFO - TPE
Crew
Boarding
Comfort
Food
Overall
Entertainment
Reviews
Thomas,Mar 2025
SFO - TPE
Crew
Boarding
Comfort
Food
Overall
Entertainment
Reviews
Thomas,Mar 2025
SFO - TPE
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$530 | Average$736 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$631 | Average$962 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$657 | Average$948 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$669 | Average$1,102 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$671 | Average$965 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$673 | Average$976 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$685 | Average$927 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$691 | Average$960 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$725 | Average$1,085 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$727 | Average$913 | FlexibilityNo cancel fee | On-time72% |