$230 Cheap Flights from Hamilton (YHM) to St. Louis (STL)

View $230 flight on Thu, Feb 12, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $230 for one-way flights and $409 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Feb 12 - Wed, Feb 18
YHM
Hamilton
STL
St. Louis
$409 Roundtrip, found 3 hours ago
$409
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Thu, Feb 12 from Hamilton to St. Louis, returning Wed, Feb 18, priced at $409 found 3 hours ago
Air Canada
Wed, Nov 5 - Sat, Nov 15
YHM
Hamilton
STL
St. Louis
$410 Roundtrip, found 18 hours ago
$410
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Wed, Nov 5 from Hamilton to St. Louis, returning Sat, Nov 15, priced at $410 found 18 hours ago
Air Canada
Thu, Nov 27 - Sun, Nov 30
YHM
Hamilton
STL
St. Louis
$462 Roundtrip, found 4 days ago
$462
Roundtrip
found 4 days ago
Select Air Canada flight, departing Thu, Nov 27 from Hamilton to St. Louis, returning Sun, Nov 30, priced at $462 found 4 days ago
Air Canada
Sun, Dec 7 - Mon, Dec 8
YHM
Hamilton
STL
St. Louis
$464 Roundtrip, found 1 day ago
$464
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sun, Dec 7 from Hamilton to St. Louis, returning Mon, Dec 8, priced at $464 found 1 day ago
Air Canada
Thu, Feb 12 - Wed, Feb 18
YHM
Hamilton
STL
St. Louis
$466 Roundtrip, found 3 hours ago
$466
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Thu, Feb 12 from Hamilton to St. Louis, returning Wed, Feb 18, priced at $466 found 3 hours ago
Air Canada
Fri, Apr 24 - Sun, Apr 26
YHM
Hamilton
STL
St. Louis
$485 Roundtrip, found 6 hours ago
$485
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Fri, Apr 24 from Hamilton to St. Louis, returning Sun, Apr 26, priced at $485 found 6 hours ago
Air Canada
Tue, Oct 28 - Wed, Oct 29
YHM
Hamilton
STL
St. Louis
$503 Roundtrip, found 18 hours ago
$503
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Tue, Oct 28 from Hamilton to St. Louis, returning Wed, Oct 29, priced at $503 found 18 hours ago
Air Canada
Thu, Nov 27 - Sun, Nov 30
YHM
Hamilton
STL
St. Louis
$518 Roundtrip, found 4 days ago
$518
Roundtrip
found 4 days ago
Select Air Canada flight, departing Thu, Nov 27 from Hamilton to St. Louis, returning Sun, Nov 30, priced at $518 found 4 days ago
Air Canada
Sun, Dec 7 - Mon, Dec 8
YHM
Hamilton
STL
St. Louis
$520 Roundtrip, found 1 day ago
$520
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sun, Dec 7 from Hamilton to St. Louis, returning Mon, Dec 8, priced at $520 found 1 day ago
Air Canada
Fri, Apr 24 - Sun, Apr 26
YHM
Hamilton
STL
St. Louis
$541 Roundtrip, found 6 hours ago
$541
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Fri, Apr 24 from Hamilton to St. Louis, returning Sun, Apr 26, priced at $541 found 6 hours ago

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $709
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $709

Frequently asked questions

How much does a flight from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $230 or cheap return flight from $409 from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL) 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 John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for February can help you save, as it's the cheapest month for flights between YHM and STL. You'll often find the lowest fares during off-peak months.
Which airlines fly direct from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
Although Hamilton, ON (YHM-John C. Munro Hamilton Intl.) has no direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop options. Leaving from Pearson Intl. Airport (YYZ) will get you to St. Louis without any layovers.
What is the cheapest airline that flies from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest YHM to STL flight.
How many flights per day from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to hop on a flight with a layover if you're traveling from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from YHM to STL?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change based on various factors, including 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 John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
Book a flight from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this have a 22% higher chance of being canceled, on average.**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.
Is it cheaper to buy a plane ticket from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your departure to book a flight from YHM to STL often results in higher prices. While you might find some last-minute offers, they're not always guaranteed. Keep your travel plans flexible to boost your chances of landing a bargain.
Is it cheaper to book a YHM to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a YHM to STL flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place will take the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from John C. Munro Hamilton Intl. Airport (YHM) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you're able to reschedule or cancel your YHM to STL flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you'd like more details, head to our Customer Service portal.

Travel information

Travel information

Origin airport
John C. Munro Hamilton Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada
Roundtrip price
$408
Distance
623 mi

Book with confidence

Book with confidence

Hamilton to St. Louis Flights

The cheapest times to fly from Hamilton to St. Louis

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 Hamilton to St. Louis are during the month of February. You can find some of the cheapest flights from Hamilton to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Hamilton to St. Louis: 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 Hamilton to St. Louis

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 Hamilton to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $230 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 Hamilton to St. Louis 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 Hamilton to St. Louis 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.

 

Hamilton to St. Louis Flights

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Explore a world of travel with Expedia

*Available to One Key members.