- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 35% on select hotels after you book a flight*
Plan, book, fly with confidence
Cheap round-trip flights to Southern Illinois
Prices were available within the past 7 days and start at HK$1,216 for one-way flights and HK$2,421 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Tuesday, 1 Oct - Thursday, 3 Oct
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
HK$2,421 Return, found 3 days ago
HK$2,421
Return
found 3 days ago
Tuesday, 1 Oct - Thursday, 3 Oct
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
HK$2,807 Return, found 3 days ago
HK$2,807
Return
found 3 days ago
Tuesday, 1 Oct - Thursday, 3 Oct
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
HK$3,194 Return, found 3 days ago
HK$3,194
Return
found 3 days ago
Thursday, 5 Sep - Friday, 13 Sep
HKG
Hong Kong Intl.
STL
Lambert-St. Louis Intl.
HK$10,655 Return, found 1 day ago
HK$10,655
Return
found 1 day ago
Thursday, 12 Dec - Monday, 23 Dec
HKG
Hong Kong Intl.
STL
Lambert-St. Louis Intl.
HK$12,173 Return, found 4 days ago
HK$12,173
Return
found 4 days ago
Frequently asked questions
Destination airport | Lambert-St. Louis Intl. |
Destination airport IATA code | STL |
Destination city name | St. Louis |
Return price | HK$2,421 |
More to explore for Southern Illinois
Heading to Southern Illinois? Explore Southern Illinois with Expedia's Travel Guides to find the best hotels, holiday packages, car hire deals and more!
Trending flights to Southern Illinois
Prices were available within the past 7 days and start at HK$1,216 for one-way flights and HK$2,421 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Thursday, 5 Sep - Friday, 13 Sep
HKG
Hong Kong Intl.
STL
Lambert-St. Louis Intl.
HK$10,655 Return, found 1 day ago
HK$10,655
Return
found 1 day ago
- Top Flights Destinations
- Flights to Cities Near Southern Illinois
- Top Southern Illinois Hotels
- Other Carriers
Top Flight Destinations
Top Flight Destinations In World
- Flights to Japan
- Flights to Taiwan
- Flights to Thailand
- Flights to Philippines
- Flights to Indonesia
- Flights to United Kingdom
- Flights to Australia
- Flights to United States of America
- Flights to South Korea
- Flights to Canada
- Flights to Vietnam
- Flights to Malaysia
- Flights to China
- Flights to New Zealand
- Flights to Italy
- Flights to Switzerland
- Flights to India
- Flights to France
- Flights to Poland
- Flights to Türkiye
Flights to Cities Near Southern Illinois
*Available to Expedia members.