Cheap Flights to Waterloo from HK$854

View HK$854 flight on Tue, 16 Sep 2025Opens in a new window

Popular airlines to Waterloo

  • 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 round-trip flights to Waterloo

Prices were available within the past 7 days and start at HK$854 for one-way flights and HK$1,708 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 16 Sep - Thu, 18 Sep
BUF
Buffalo
STL
St. Louis
HK$1,708 Return, found 22 hours ago
HK$1,708
Return
found 22 hours ago
Select Delta flight, departing Tue, 16 Sep from Buffalo to St. Louis, returning Thu, 18 Sep, priced at HK$1,708 found 22 hours ago
United
Tue, 16 Sep - Thu, 18 Sep
BUF
Buffalo
STL
St. Louis
HK$1,988 Return, found 22 hours ago
HK$1,988
Return
found 22 hours ago
Select United flight, departing Tue, 16 Sep from Buffalo to St. Louis, returning Thu, 18 Sep, priced at HK$1,988 found 22 hours ago
American Airlines
Tue, 16 Sep - Thu, 18 Sep
BUF
Buffalo
STL
St. Louis
HK$2,256 Return, found 22 hours ago
HK$2,256
Return
found 22 hours ago
Select American Airlines flight, departing Tue, 16 Sep from Buffalo to St. Louis, returning Thu, 18 Sep, priced at HK$2,256 found 22 hours ago
Air Canada
Tue, 16 Sep - Fri, 19 Sep
PLS
Providenciales
STL
St. Louis
HK$6,017 Return, found 1 day ago
HK$6,017
Return
found 1 day ago
Select Air Canada flight, departing Tue, 16 Sep from Providenciales to St. Louis, returning Fri, 19 Sep, priced at HK$6,017 found 1 day ago
Korean Air
Wed, 25 Jun - Tue, 2 Sep
ICN
Seoul
STL
St. Louis
HK$7,011 Return, found 21 hours ago
HK$7,011
Return
found 21 hours ago
Select Korean Air flight, departing Wed, 25 Jun from Seoul to St. Louis, returning Tue, 2 Sep, priced at HK$7,011 found 21 hours ago

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

August is typically the cheapest month to fly

From HK$1,368 - HK$5,558 per traveller.

Graph displaying average flight prices per month

Flights to Waterloo information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
HK$1,708

Trending flights to Waterloo

Prices were available within the past 7 days and start at HK$854 for one-way flights and HK$1,708 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Asiana Airlines
Fri, 11 Jul - Sat, 9 Aug
HKG
Hong Kong SAR
STL
St. Louis
HK$9,013 Return, found 1 day ago
HK$9,013
Return
found 1 day ago
Select Asiana Airlines flight, departing Fri, 11 Jul from Hong Kong SAR to St. Louis, returning Sat, 9 Aug, priced at HK$9,013 found 1 day ago
*Available to Expedia members.