St Louis to London flights

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Airlines seen: Air Canada, American Airlines, Delta Air Lines, Frontier Airlines, United Airlines
Typical journey time: 9h 49m

Fare seen

€438Seen on 11 Sep 2026

Last checked

9 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €238

Lowest observed

28 Feb 2027

One way

Cheapest observed day · Last checked: 11 Sep 2026

When to fly

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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.

Prices are for observed departure and return date pairs. No data does not mean no flights.

Short answer

We have seen Air Canada fares from St Louis to London. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare. Fare seen: €438 on 11 Sep 2026.

About this route

Explore the fares we observed from St Louis to London. Prices move often, so pick your dates to see the latest options.

Route distance: 6,760 km
Typical journey time: 9h 49m
Airlines seen: Air Canada, American Airlines, Delta Air Lines, Frontier Airlines, United Airlines
Alternative airports: SUS, LCY, LGW, LTN, SEN, STN

Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.

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Observed, not guaranteed

Every price is a fare we actually saw, and it may change at any time.

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How our prices work

Airport to city: straight-line distance

St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
London City Airport (LCY) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 13 km.
London Heathrow (LHR) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 23 km.
London Gatwick (LGW) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 40 km.
London Luton (LTN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 44 km.
London Stansted (STN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 49 km.
London Southend Airport (SEN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 57 km.

Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.