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Cheap Flights from Ontario to St Louis - ONT to STL (reverse)

Popular Flights from Ontario to St Louis

  • Airfare from Ontario to St Louis on American from $418 round trip
  • Airfare from Ontario to St Louis on Delta from $418 round trip
  • Airfare from Ontario to St Louis on United from $418 round trip
  • Airfare from Ontario to St Louis on US Airways from $418 round trip
  • Airfare from Ontario to St Louis on Alaska from $578 round trip

Did You Know?

  • 108,393 seats are available per day to fly out of Ontario, CA connecting to St Louis, MO
  • Continental has 5 one stop flights between Ontario, CA and St Louis, MO.
  • The shortest flight between Ontario, CA and St Louis, MO on Continental is 1,960 miles.
  • The largest aircraft operated by Alaska flying between Ontario, CA and St Louis, MO is a 737 with 144 seats.
  • Dallas-Fort Worth, TX is the most popular connection for one stop flights between Ontario, CA and St Louis, MO.
  • 96 flights per week fly out of Ontario, CA connecting to St Louis, MO
  • 8 airlines operate between Ontario, CA and St Louis, MO
  • Southwest has the most one stop flights between Ontario, CA and St Louis, MO.

Advance Purchase Prices from Ontario to St Louis

  • Carrier
    0 Days
    1 Day
    3 Days
    7 Days
    10 Days
    14 Days
    21 Days
  • Alaska
    $1131
    $1131
    $1131
    $949
    $949
    $671
    $671
  • American
    $521
    $521
    $521
    $401
    $401
    $307
    $307
  • Continental
    $521
    $521
    $521
    $401
    $401
    $321
    $321
  • Delta
    $521
    $521
    $521
    $401
    $401
    $307
    $307
  • US Airways
    $521
    $521
    $521
    $421
    $421
    $341
    $341
  • United
    $521
    $521
    $521
    $401
    $401
    $321
    $321

Cheap Domestic Flights from Ontario - ONT

Flights
Airline
Lowest Price
American, US Airways, Alaska, United, Delta
$176
United, Alaska, US Airways
$136
Delta, US Airways, United, Alaska, American
$233
American, Alaska, United, Delta, US Airways
$236
Alaska, American, US Airways, Delta, United
$176
United, US Airways, American, AirTran
$296
Cheap Flights from Ontario to St Louis, from $418 Round trip from ONT to STL