Cheap flights from London to Southern Illinois

View AU$1,159 flight on Tue, 6 Jan. 2026Opens in a new window

Popular airlines from London to Southern Illinois

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from London (LON) to Southern Illinois (STL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,486 Return, found 5 days ago
AU$1,486
Return
found 5 days ago
Select Air Canada flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,486 found 5 days ago
Air Canada
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,497 Return, found 5 days ago
AU$1,497
Return
found 5 days ago
Select Air Canada flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,497 found 5 days ago
United
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,505 Return, found 5 days ago
AU$1,505
Return
found 5 days ago
Select United flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,505 found 5 days ago
Virgin Atlantic
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,520 Return, found 5 days ago
AU$1,520
Return
found 5 days ago
Select Virgin Atlantic flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,520 found 5 days ago
Finnair
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,538 Return, found 5 days ago
AU$1,538
Return
found 5 days ago
Select Finnair flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,538 found 5 days ago
British Airways
Mon, 25 Aug. - Tue, 9 Sep.
LHR
London
STL
St. Louis
AU$1,547 Return, found 5 days ago
AU$1,547
Return
found 5 days ago
Select British Airways flight, departing Mon, 25 Aug. from London to St. Louis, returning Tue, 9 Sep., priced at AU$1,547 found 5 days ago
*Available to Expedia members.