$199 Cheap Flights from St. Louis (STL) to Hamilton (YHM)

View $199 flight on Fri, May 9, 2025Opens in a new window

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Find available prices by choosing your travel dates.

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

Prices were available within the past 7 days and start at $199 for one-way flights and $488 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Aug 27 - Sat, Aug 30
STL
St. Louis
YHM
Hamilton
$488 Roundtrip, just found
$488
Roundtrip
just found
Select Air Canada flight, departing Wed, Aug 27 from St. Louis to Hamilton, returning Sat, Aug 30, priced at $488 just found
Air Canada
Thu, Jul 17 - Mon, Jul 21
STL
St. Louis
YHM
Hamilton
$499 Roundtrip, found 13 hours ago
$499
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Thu, Jul 17 from St. Louis to Hamilton, returning Mon, Jul 21, priced at $499 found 13 hours ago
Air Canada
Thu, Jul 3 - Mon, Jul 7
STL
St. Louis
YHM
Hamilton
$500 Roundtrip, found 14 hours ago
$500
Roundtrip
found 14 hours ago
Select Air Canada flight, departing Thu, Jul 3 from St. Louis to Hamilton, returning Mon, Jul 7, priced at $500 found 14 hours ago
Air Canada
Mon, Jul 21 - Fri, Jul 25
STL
St. Louis
YHM
Hamilton
$503 Roundtrip, found 5 days ago
$503
Roundtrip
found 5 days ago
Select Air Canada flight, departing Mon, Jul 21 from St. Louis to Hamilton, returning Fri, Jul 25, priced at $503 found 5 days ago
Air Canada
Thu, Sep 11 - Thu, Sep 18
STL
St. Louis
YHM
Hamilton
$504 Roundtrip, found 5 days ago
$504
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Sep 11 from St. Louis to Hamilton, returning Thu, Sep 18, priced at $504 found 5 days ago
Air Canada
Fri, May 30 - Mon, Jun 2
STL
St. Louis
YHM
Hamilton
$505 Roundtrip, found 5 days ago
$505
Roundtrip
found 5 days ago
Select Air Canada flight, departing Fri, May 30 from St. Louis to Hamilton, returning Mon, Jun 2, priced at $505 found 5 days ago
Air Canada
Thu, Jul 17 - Mon, Jul 21
STL
St. Louis
YHM
Hamilton
$506 Roundtrip, found 13 hours ago
$506
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Thu, Jul 17 from St. Louis to Hamilton, returning Mon, Jul 21, priced at $506 found 13 hours ago
Air Canada
Thu, Jul 10 - Tue, Jul 15
STL
St. Louis
YHM
Hamilton
$507 Roundtrip, found 1 day ago
$507
Roundtrip
found 1 day ago
Select Air Canada flight, departing Thu, Jul 10 from St. Louis to Hamilton, returning Tue, Jul 15, priced at $507 found 1 day ago
Air Canada
Wed, Aug 27 - Sat, Aug 30
STL
St. Louis
YHM
Hamilton
$508 Roundtrip, just found
$508
Roundtrip
just found
Select Air Canada flight, departing Wed, Aug 27 from St. Louis to Hamilton, returning Sat, Aug 30, priced at $508 just found
Air Canada
Sun, Sep 28 - Sat, Oct 4
STL
St. Louis
YHM
Hamilton
$511 Roundtrip, found 4 days ago
$511
Roundtrip
found 4 days ago
Select Air Canada flight, departing Sun, Sep 28 from St. Louis to Hamilton, returning Sat, Oct 4, priced at $511 found 4 days ago
Flights from St. Louis (STL) to Hamilton (YHM)
Origin airport
Lambert-St. Louis Intl.
Destination airport
John C. Munro Hamilton Intl.
Airlines serving
Air Canada
Roundtrip price
$488
Distance
623 mi

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 August. 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 $199 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.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to John C. Munro Hamilton Intl. Airport (YHM) cost?
Discover the latest flight deals from STL to YHM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to YHM?
The cheapest flights from STL to YHM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to YHM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to YHM. Sort your results by “Price (lowest to highest)” to snap up a great deal.
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.

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*Available to One Key members.