$58 Cheap Flights to St. Mary's

Flights to St. Mary's at a glance

Traveling to St. Mary's is a breeze with options from full-service and budget airlines. Compare flight durations to find the choice that aligns with your budget and schedule, setting you up to explore the city's renowned attractions and neighborhoods.

• Major airports near St. Mary's: Region of Waterloo International Airport (YKF), John C. Munro Hamilton International Airport (YHM), London International Airport (YXU)
• Closest airport to St. Mary's: London International Airport, YXU (around 16 miles)
• Flights per week: 140+ flights arriving across St. Mary's airports
• Number of airlines that fly to St. Mary's: around 5+ carriers

Popular airports near St. Mary's

St. Mary's is a lively city that caters to families, business travelers, and those seeking urban getaways. Visitors are drawn to its rich culture, beautiful beaches, family-friendly activities, and outdoor pursuits. The city is conveniently served by three major airports.

• Region of Waterloo International Airport (YKF): Situated in the Waterloo Regional Municipality of Ontario, this airport is approximately 40 miles from St. Mary's. It offers a variety of domestic and international flights, linking to about 5 domestic locations and 4 international spots. Notable airlines operating here include Flair Airlines, Air Canada, and WestJet.
• John C. Munro Hamilton International Airport (YHM): Found in Ontario, roughly 62 miles from St. Mary's, this airport caters to both domestic and international travelers, connecting to approximately 4 domestic cities and 2 international destinations. Key airlines serving this airport are Porter Airlines, WestJet, and Air Canada.
• London International Airport (YXU): Located in Ontario, around 16 miles from St. Mary's, this airport facilitates both domestic and international travel, with connections to about 2 domestic cities and 4 international destinations. Major carriers at this airport include Air Canada, WestJet, and Flair Airlines.

Top routes to St. Mary's

• Calgary (YYC) to St. Mary's (YXU/YHM/YKF), with one-way tickets available from around $55
• Vancouver (YVR) to St. Mary's (YXU/YHM/YKF), with one-way flights starting at around $55
• Orlando (MCO) to St. Mary's (YXU/YHM/YKF), with one-way airfare from around $30
• Halifax (YHZ) to St. Mary's (YHM/YKF), with one-way tickets available from around $50
• Los Angeles (LAX) to St. Mary's (YXU/YKF), with one-way flight options from around $80

Cheapest routes to St. Mary's

• Fort Lauderdale (FLL) to St. Mary's (YHM/YKF), with budget one-way fares from around $20
• Orlando (MCO) to St. Mary's (YXU/YHM/YKF), with low-cost one-way tickets from around $30
• Edmonton (YEG) to St. Mary's (YHM/YKF), with low one-way fares from around $45
• Halifax (YHZ) to St. Mary's (YHM/YKF), with low one-way fares from around $50
• Vancouver (YVR) to St. Mary's (YXU/YHM/YKF), with cheap one-way fares from around $55

*Flight times and fares vary by season and availability and are based on one-way routes

Top airlines with flights to St. Mary's

• Flair Airlines: Operating flights to London International Airport (YXU) and Region of Waterloo International Airport (YKF), Flair Airlines represents roughly 37% of St. Mary's arrivals. The typical one-way fare hovers around $110.
• Air Canada: This airline services London International Airport (YXU), John C. Munro Hamilton International Airport (YHM), and Region of Waterloo International Airport (YKF), contributing to about 25% of St. Mary's incoming flights. Average one-way fares are around $200.
• WestJet: Offering routes to London International Airport (YXU), John C. Munro Hamilton International Airport (YHM), and Region of Waterloo International Airport (YKF), WestJet accounts for close to 16% of arrivals to St. Mary's. The average one-way fare is approximately $180.
• Porter Airlines: Serving flights to John C. Munro Hamilton International Airport (YHM), Porter Airlines comprises about 15% of arrivals to St. Mary's. Passengers can expect an average one-way fare of around $180.
• Air Transat: Operating to John C. Munro Hamilton International Airport (YHM), Air Transat is responsible for roughly 5% of arrivals to St. Mary's. The average cost for a one-way ticket is about $250.

Best time to fly to St. Mary's

The most popular months for travelers to fly to St. Mary's are April, July, and August, when peak temperatures in St. Mary's can reach up to 69.8°F in July. If you prefer quieter travel, consider May, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 56.8°F. For better deals, February usually offers the lowest average one-way fare around $154, roughly 18% cheaper than the yearly average. Looking for additional cheaper months to fly? January offers an average one-way fare of around $159, making it a good option for flexible travelers.

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

How to save money on a flight to St. Mary's

Getting some of the best deals on flights to St. Mary's is all about timing and flexibility. Here are some key tips to help you save:

1. Compare flight options—use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
2. Set up price alerts—as an Expedia member you can use Price Tracking to receive notifications when flight prices change.
3. Bundle and save—book a flight and unlock a hotel deal on Expedia*, or explore our St. Mary's hotel and flight deals.
4. Think about luggage-nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your baggage allowance before confirming your booking to avoid excess baggage fees at the airport.
5. Earn miles—you can earn airline miles when you book your St. Mary's flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in St. Mary's

St. Mary's welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach St. Mary's efficiently:

• Public transportation: From Region of Waterloo International Airport, Kitchener Station, a train station, is located about 9.1 miles away by car, providing convenient access to rail services for your onward journey.
• Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Mary's, with private rides that can be arranged in advance.
• Car rental: Renting a car in St. Mary's is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in St. Mary's on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.

Where to stay around St. Mary's

• Stratford: Stratford is located 13 miles drive away from St. Mary's and is known for its vibrant arts scene and rich history. This charming city attracts visitors with its renowned theaters, including the famous Stratford Festival. Whether you're exploring the scenic Avon River or visiting cultural gems like the Stratford-Perth Museum and historic Stratford City Hall, there’s something for everyone. Enjoy a day at the public market or relax at one of the local beaches, making Stratford a delightful destination for families and culture enthusiasts alike.
• Perth South: Situated only 4 miles drive away from St. Mary's, Perth South offers a blend of urban charm and natural beauty. This city is perfect for family outings and business trips alike, with its welcoming public markets and recreational areas. Explore the picturesque Avon River, unwind at the local beaches, or soak in the atmosphere at community events. Perth South is an excellent spot for travelers seeking both relaxation and engagement with local culture.
• Granton: Granton is located 7 miles drive away from St. Mary's and is a quaint village celebrated for its cultural offerings and nearby beaches. Visitors can immerse themselves in the local arts scene at the arts center or explore the history at the Canadian Baseball Hall of Fame and Museum. The beautiful riverside and art gallery provide a serene backdrop for a leisurely day. Granton is ideal for those looking for a peaceful retreat combined with cultural exploration.

Tips for short-haul flights to St. Mary's

For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother:

• Pack light and skip checked bags—with budget airlines, traveling with just a carry-on is often more economical. Maximize space by using mini toiletries, wearing your heaviest clothing, and planning your outfits carefully. This approach also allows you to bypass the wait at baggage claim upon arrival.
• Bring your own entertainment—short-haul flights frequently lack in-flight entertainment. Download your favorite TV shows, movies, music, or podcasts beforehand, and consider bringing a book to keep yourself occupied. Remember to charge your devices fully before you board.
• Arrive at the airport in plenty of time—for both short and domestic flights, it’s advisable to get to the airport at least 1.5 to 2 hours prior to your departure, taking into account traffic and security lines.
• Bring your own snacks and water—pack some snacks and a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to St. Mary's

Flying long-haul sometimes requires extra planning to ensure a comfortable journey:

• Select your seat in advance—for longer flights, choosing your seat is crucial for comfort. Full-service airlines often provide complimentary seat selection once online check-in begins, typically 24–48 hours prior to your flight. Some airlines allow seat selection even earlier than this.
• Arrive at the airport in plenty of time—aim to be at the airport at least 3 hours before departure for international flights to ensure you have enough time for check-in, security, and immigration procedures.
• Relax at the airport—if you find yourself with extra time, take the opportunity to explore the shops, grab a coffee, or unwind at your gate or in a departure lounge if you have access. Most airports offer free Wi-Fi for your convenience.
• Adjust to the new time zone mid-flight—begin to sync your body clock by changing your watch and adjusting your sleep schedule to align with your destination's time zone. Aim to sleep or stay awake during the flight according to the local time at your arrival destination to help minimize jet lag.

Tips to find the cheapest flights to St. Mary's

The cheapest day to fly

Get started finding a cheap flight to St. Mary's on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

The cheapest month to fly

October is the cheapest month to fly to St. Mary's. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to St. Mary's. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to St. Mary's, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to St. Mary's

The lowest price for round-trip flights to St. Mary's in 2026 starts from $170, while one-way tickets start from from $58. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to St. Mary's. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to St. Mary's

Flair Airlines, American Airlines, United, Delta, Air Canada, WestJet are just some of the airlines that can typically offer cheap tickets to St. Mary's. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to St. Mary's and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for St. Mary's, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to St. Mary's. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your St. Mary's plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to St. Mary's

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to St. Mary's.

Stopover savings

The cheapest tickets to St. Mary's are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to St. Mary's. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to St. Mary's for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to St. Mary's. Simply download the free Expedia app to your smart device and activate St. Mary's flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to St. Mary's. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

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