Cheap Flights to O'Fallon from HK$2,902

View HK$2,902 flight on Sat, 29 Nov 2025Opens in a new window

Popular airlines to O'Fallon

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Cheap round-trip flights to O'Fallon

Prices were available within the past 7 days and start at HK$2,902 for one-way flights and HK$5,733 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aeromexico
Wed, 9 Jul - Fri, 11 Jul
MEX
Mexico City
STL
St. Louis
HK$5,733 Return, found 1 day ago
HK$5,733
Return
found 1 day ago
Select Aeromexico flight, departing Wed, 9 Jul from Mexico City to St. Louis, returning Fri, 11 Jul, priced at HK$5,733 found 1 day ago
United
Wed, 9 Jul - Fri, 11 Jul
MEX
Mexico City
STL
St. Louis
HK$6,097 Return, found 1 day ago
HK$6,097
Return
found 1 day ago
Select United flight, departing Wed, 9 Jul from Mexico City to St. Louis, returning Fri, 11 Jul, priced at HK$6,097 found 1 day ago
Delta
Sat, 12 Jul - Tue, 15 Jul
MEX
Mexico City
STL
St. Louis
HK$6,340 Return, found 1 day ago
HK$6,340
Return
found 1 day ago
Select Delta flight, departing Sat, 12 Jul from Mexico City to St. Louis, returning Tue, 15 Jul, priced at HK$6,340 found 1 day ago
Air Canada
Wed, 9 Jul - Fri, 11 Jul
MEX
Mexico City
STL
St. Louis
HK$6,465 Return, found 1 day ago
HK$6,465
Return
found 1 day ago
Select Air Canada flight, departing Wed, 9 Jul from Mexico City to St. Louis, returning Fri, 11 Jul, priced at HK$6,465 found 1 day ago
EVA Airways
Sun, 7 Sep - Wed, 10 Sep
HKG
Hong Kong SAR
STL
St. Louis
HK$7,561 Return, found 2 days ago
HK$7,561
Return
found 2 days ago
Select EVA Airways flight, departing Sun, 7 Sep from Hong Kong SAR to St. Louis, returning Wed, 10 Sep, priced at HK$7,561 found 2 days ago

Find the cheapest month to fly from Columbus (CMH) to St. Louis (STL)

August is typically the cheapest month to fly

From HK$1,232 - HK$5,452 per traveller.

Graph displaying average flight prices per month

Flights to O'Fallon information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
HK$5,733
*Available to Expedia members.