Are these the guaranteed airline ticket prices?

No. AirHint displays the lowest fares we found in a recent search. Airlines change prices often; confirm the total on the booking site before you pay.

How current are these prices?

Results refresh when you open or revisit this page. Last snapshot: Oct 13, 2026.

Where do I complete my booking?

Use the price buttons to continue on our booking partner's site. AirHint surfaces fares; ticketing is completed with the airline or agency.

Cheapest one-way flights from St. Louis (STL) to London (LHR), December

7 dates in December, from $ 418. Book in one tap, or check whether to buy now or wait.

One-way Return

Dates, airline, and price
Dates	Airline	Price
7 Dec	Frontier Airlines
6 Dec	Southern Airways Express
15 Dec	Frontier Airlines

22 Dec	Frontier Airlines
16 Dec	United
10 Dec	United
11 Dec	United

Cheapest deals for the full year

Deals for return flights from St. Louis to London in December.

Book a cheap hotel in London

Cheap car rent in Heathrow

Updated Oct 13, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Find your flight now

Feel free to contact us with any feedback or request another flight research.

Cheapest one-way flights from St. Louis (STL) to London (LHR), December

About these fares

Sign In

User Name