International route
Cheap flights from St. Louis to London
St. Louis Lambert International Airport (STL) to London Heathrow Airport (LHR). 4,190 miles, connecting flights only.
STL to LHR at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 4,190 milesgreat-circle
- Typical flight time
- 8h 5mif flown nonstop
- Nonstop airlines
- None (connecting only)
- Nonstop flights per day
- 0connections available
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Wednesday17% less than Sunday
- Time difference
- 6h aheadLondon vs St. Louis
St. Louis to London
Round trips from $340
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppSt. Louis to London fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying St. Louis to London
No nonstop service: 19 airlines offer one-stop itineraries.
- EIAer LingusConnecting via SNN · first checked bag from $70
- ACAir CanadaStar AllianceConnecting via YVR, YUL, YYC · first checked bag from $35
- AFAir FranceSkyTeamConnecting via CDG, ORY · first checked bag from $75
- ASAlaska AirlinesoneworldConnecting via SEA, PDX · first checked bag from $35
- AAAmerican AirlinesoneworldConnecting via DFW, CLT, ORD, MIA, PHX, PHL, DCA, JFK · first checked bag from $40
- DLDelta Air LinesSkyTeamConnecting via ATL, MSP, DTW, SLC, SEA, JFK, BOS, LGA · first checked bag from $35
- AYFinnaironeworldConnecting via HEL · first checked bag from $70
- IBIberiaoneworldConnecting via MAD · first checked bag from $70
- AZITA AirwaysConnecting via FCO, MXP · first checked bag from $70
- B6JetBlueConnecting via JFK, BOS, MCO, SJU · first checked bag from $40
- KLKLM Royal Dutch AirlinesSkyTeamConnecting via AMS · first checked bag from $75
- LHLufthansaStar AllianceConnecting via MUC · first checked bag from $75
- SKSAS Scandinavian AirlinesSkyTeamConnecting via ARN · first checked bag from $70
- TPTAP Air PortugalStar AllianceConnecting via LIS · first checked bag from $70
- UAUnited AirlinesStar AllianceConnecting via ORD, IAH, IAD · first checked bag from $40
- VSVirgin AtlanticSkyTeamConnecting via MAN · first checked bag from $75
- VBVivaLow-costConnecting via MTY, CUN · first checked bag from $45
- Y4VolarisLow-costConnecting via CUN · first checked bag from $45
- WSWestJetConnecting via YYZ · first checked bag from $35
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- New York (JFK)AADLB63 airlines
- Chicago (ORD)AAUA2 airlines
- Seattle (SEA)DLAS2 airlines
- Boston (BOS)DLB62 airlines
- Cancun (CUN)VBY42 airlines
Which airport should I use?
St. LouisLondon has 3 airports. Fares can differ by $50 to $150 round trip between them, so check the alternatives before you book.
Tips for this route
- There is no scheduled nonstop between STL and LHR. Every itinerary connects, most often through JFK, ORD or SEA, so sort results by total travel time rather than price alone.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $340; September 2026 is the most expensive at $472 and up, a difference of $132 per traveler.
- Departing on a Wednesday averages 17% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Book 2 to 5 months ahead for the best fares; long-haul seats sell out earliest for summer and holiday travel.
- London is 6 hours ahead of St. Louis. Expect to lose 6 hours on the clock heading east, so an overnight or late-afternoon departure tends to arrive at a more usable hour.
Destination guide
London: The most-flown transatlantic route, for good reason
London is the busiest international destination from the US, with nonstops from more than 30 American cities into Heathrow and Gatwick. The museums are free, the theater is world-class and the Tube reaches everything — including Heathrow.
Best time to visit: May–June and September are mild with long days; July–August is warm and busy. December has Christmas markets and lights. January–March is cold and gray but fares can drop below $500 round trip.
Flying the other way? London to St. LouisFares, airlines and tips for LHR to STL.Ready to compare live fares?
See every airline on STL–LHR side by side with bags and seat rules spelled out.
Search St. Louis to LondonSt. Louis to London: common questions
How long is the flight from St. Louis to London?
There are no nonstop flights, so the trip from St. Louis (STL) to London (LHR) takes 8h 5m of flying plus a layover, usually 11h 5m or more door to door across 4,190 miles.
Which airlines fly nonstop from STL to LHR?
No airline currently flies nonstop between St. Louis (STL) and London (LHR). The most common connections are through JFK, ORD and SEA.
What is the cheapest month to fly from St. Louis to London?
Over the next six months, January 2027 has the lowest round-trip fares from St. Louis (STL) to London (LHR), starting at $340 per traveler including taxes and fees. Within any month, Wednesday departures average the lowest prices.
How far in advance should I book St. Louis to London flights?
Book 2 to 5 months ahead for the best fares; long-haul seats sell out earliest for summer and holiday travel. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between St. Louis and London?
London is 6 hours ahead of St. Louis. STL is on America/Chicago time and LHR on Europe/London time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.