St. Louis to London flights from £545
Flights starting at £545. Choose between United Airlines, American Airlines, or Ryanair to find the best price.
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Tips to know when travelling to London
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Check-in for a flight from St. Louis to London
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
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United Airlines | UAL | UA | Yes | No |
American Airlines | AAL | AA | Yes | No |
Ryanair | RYR | FR | No | Opens 24 days before flight Closes 2 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Play | FPY | OG | No | No |
United Kingdom COVID-19 travel restrictions

Latest COVID-19 restrictions
United Kingdom
Travel is allowed
No proof of a pre-departure COVID-19 test required
No quarantine required

Most travelers from St Louis, STL with proof of full COVID-19 vaccination can enter London, LHR, but there are restrictions.
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Return
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Forms and documents |
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Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.
Learn more about COVID-19 restrictions in United Kingdom in our dedicated Stories article.
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