$234 Cheap Flights from St. Louis (STL) to Hamilton (YHM)

View $234 flight on Sat, Oct 11, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)

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Cheap Flights from St. Louis to Hamilton (STL-YHM)

Prices were available within the past 7 days and start at $234 for one-way flights and $518 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Oct 30 - Sun, Nov 2
STL
St. Louis
YHM
Hamilton
$518 Roundtrip, just found
$518
Roundtrip
just found
Select Air Canada flight, departing Thu, Oct 30 from St. Louis to Hamilton, returning Sun, Nov 2, priced at $518 just found
Air Canada
Fri, Nov 28 - Sun, Nov 30
STL
St. Louis
YHM
Hamilton
$589 Roundtrip, found 1 day ago
$589
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Nov 28 from St. Louis to Hamilton, returning Sun, Nov 30, priced at $589 found 1 day ago
Air Canada
Wed, Nov 26 - Sun, Nov 30
STL
St. Louis
YHM
Hamilton
$589 Roundtrip, found 4 days ago
$589
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Nov 26 from St. Louis to Hamilton, returning Sun, Nov 30, priced at $589 found 4 days ago
Air Canada
Thu, Oct 30 - Sun, Nov 2
STL
St. Louis
YHM
Hamilton
$593 Roundtrip, just found
$593
Roundtrip
just found
Select Air Canada flight, departing Thu, Oct 30 from St. Louis to Hamilton, returning Sun, Nov 2, priced at $593 just found
Air Canada
Thu, Oct 30 - Mon, Nov 3
STL
St. Louis
YHM
Hamilton
$610 Roundtrip, found 4 days ago
$610
Roundtrip
found 4 days ago
Select Air Canada flight, departing Thu, Oct 30 from St. Louis to Hamilton, returning Mon, Nov 3, priced at $610 found 4 days ago
Air Canada
Thu, Dec 25 - Wed, Dec 31
STL
St. Louis
YHM
Hamilton
$619 Roundtrip, found 1 hour ago
$619
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Thu, Dec 25 from St. Louis to Hamilton, returning Wed, Dec 31, priced at $619 found 1 hour ago
Air Canada
Sat, Dec 13 - Wed, Dec 17
STL
St. Louis
YHM
Hamilton
$619 Roundtrip, found 3 days ago
$619
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sat, Dec 13 from St. Louis to Hamilton, returning Wed, Dec 17, priced at $619 found 3 days ago
Air Canada
Fri, Oct 31 - Tue, Nov 4
STL
St. Louis
YHM
Hamilton
$630 Roundtrip, found 4 days ago
$630
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Oct 31 from St. Louis to Hamilton, returning Tue, Nov 4, priced at $630 found 4 days ago
Air Canada
Thu, Nov 6 - Sun, Nov 9
STL
St. Louis
YHM
Hamilton
$642 Roundtrip, found 1 hour ago
$642
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Thu, Nov 6 from St. Louis to Hamilton, returning Sun, Nov 9, priced at $642 found 1 hour ago
United
Thu, Oct 30 - Mon, Nov 3
STL
St. Louis
YHM
Hamilton
$659 Roundtrip, found 4 days ago
$659
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 30 from St. Louis to Hamilton, returning Mon, Nov 3, priced at $659 found 4 days ago

Alternative airports near Hamilton

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Region of Waterloo Intl. YKF. Cheapest option available. Average driving time to city center is 57 minutes. Flights from $642
YKF
Region of Waterloo Intl.
Cheapest
Average driving time to city center57 min
Flights from $642

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM) cost?
Snag a cheap one-way flight from $234 or cheap return flight from $518 from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)?
October is the most affordable month to fly from STL to YHM. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from STL to YHM. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)?
There are no daily direct flights from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from STL to YHM?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a range of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM) route, aim to travel before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Hamilton from Lambert-St. Louis Intl. Airport (STL)?
Pearson Intl. Airport (YYZ) is the only airport in Hamilton with direct flights from Lambert-St. Louis Intl. Airport (STL). Explore your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM) last-minute?
Booking your flight from STL to YHM right before your getaway is generally more expensive. But if you're flexible with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book a STL to YHM flight and hotel package?
Booking a STL to YHM flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our impressive range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM)?
If you booked your STL to YHM flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
John C. Munro Hamilton Intl.
Airlines serving
Air Canada
Roundtrip price
$517
Distance
623 mi

Book with confidence

Book with confidence

St. Louis to Hamilton Flights

The cheapest times to fly from St. Louis to Hamilton

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Hamilton are during the month of October. You can find some of the cheapest flights from St. Louis to Hamilton with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Hamilton

Sunday is one of the best days to book for cheap flights from St. Louis to Hamilton: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Hamilton

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Hamilton in 2025. You can also book with separate airlines for your outbound and return journeys, from $234 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Hamilton flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Hamilton airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Hamilton Flights

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*Available to One Key members.