Flights to Southwest Illinois from Oklahoma City - ￥14,430

View ￥14,430 flight on Tue, Oct 14, 2025Opens in a new window

Popular airlines from Oklahoma City to Southwest Illinois

  • Peach

    Peach

  • Skymark Airlines

    Skymark Airlines

  • All Nippon Airways

    All Nippon Airways

  • Japan Airlines

    Japan Airlines

  • Jetstar Japan

    Jetstar Japan

  • Solaseed Air

    Solaseed Air

  • STARFLYER

    STARFLYER

  • 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 40% 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 Oklahoma City to Southwest Illinois (OKC-STL)

Prices were available within the past 7 days and start at ￥14,430 for one-way flights and ￥27,360 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥27,360 Roundtrip, found 2 days ago
￥27,360
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥27,360 found 2 days ago
American Airlines
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥28,760 Roundtrip, found 2 days ago
￥28,760
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥28,760 found 2 days ago
Delta
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥36,390 Roundtrip, found 2 days ago
￥36,390
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥36,390 found 2 days ago
American Airlines
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥36,930 Roundtrip, found 2 days ago
￥36,930
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥36,930 found 2 days ago
American Airlines
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥39,290 Roundtrip, found 2 days ago
￥39,290
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥39,290 found 2 days ago
United
Wed, Aug 13 - Mon, Aug 18
OKC
Oklahoma City
STL
St. Louis
￥53,910 Roundtrip, found 2 days ago
￥53,910
Roundtrip
found 2 days ago
Select United flight, departing Wed, Aug 13 from Oklahoma City to St. Louis, returning Mon, Aug 18, priced at ￥53,910 found 2 days ago
*Available to Expedia members.