$224 Cheap United flights from Seattle to Montreal (SEA to YUL)

Q: If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Montréal–Trudeau, please visit our Customer Service Portal .

Find The Best Day To Fly from Seattle to Montreal

Amazing United SEA to YUL Flight Deals

The cheapest flights to Pierre Elliott Trudeau Intl. found within the past 7 days were $363 round trip and $224 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Sep 8 - Fri, Sep 12

SEA

Seattle

YUL

Montreal

$363

Roundtrip

found 1 day ago

Sat, Sep 13 - Thu, Sep 18

SEA

Seattle

YUL

Montreal

$414

Roundtrip

found 20 hours ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle

YUL

Montreal

$419

Roundtrip

found 15 hours ago

Sat, Sep 13 - Thu, Sep 18

SEA

Seattle

YUL

Montreal

$508

Roundtrip

found 20 hours ago

YUL From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.

Le Victoria MidTown Montreal

Save 100% on your flight

per person

Sep 20 - Sep 27

found 15 hours ago

Roundtrip flight included

Seattle (SEA) to Montreal (YUL)

Hotel Birks Montreal

Save 100% on your flight

per person

Sep 20 - Sep 27

found 15 hours ago

Roundtrip flight included

Seattle (SEA) to Montreal (YUL)

Liv MTL - Soho

Save 100% on your flight

per person

Sep 20 - Sep 27

found 15 hours ago

Roundtrip flight included

Seattle (SEA) to Montreal (YUL)

Don't see what you're looking for?

See all available trips from Seattle - Tacoma Intl. to Pierre Elliott Trudeau Intl.

View all trips

Frequently asked questions

Can I catch a flight from Sea-Tac Airport to Montréal--Trudeau right now?

For information on any current Pierre Elliott Trudeau Intl. Airport (YUL) quarantine requirements and travel advice, go to our Covid-19 Travel Advisor. Look before you book your flight, so you don't get caught out.

What terminal is United Airlines at Sea-Tac Airport?

While it's hard to say exactly which terminal your United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Montréal--Trudeau will take off from, we can tell you that you'll probably be getting off the plane at the main terminal.

Are there United Airlines non-stop flights from SEA to YUL?

If you're traveling with United Airlines from Sea-Tac Airport to Montreal Airport, you'll have to make at least one stop. While you're waiting for your connecting flight, use the time to grab a quick bite or stretch your legs.

How long is a United Airlines flight from SEA to YUL?

Throw that book in your carry-on you've been desperate to read. A flight from Seattle - Tacoma Intl. Airport (SEA) to Montreal Airport with United Airlines takes roughly 6 hours and 7 minutes. You'll have sufficient time to completely lose yourself in the storyline.

What type of aircraft does United Airlines fly from SEA to YUL?

Tighten your seat belt and get acquainted with the Airbus A220-300. This airplane is typically used on the SEA to YUL route when flying with United Airlines.

How many direct and indirect flights does United Airlines fly from SEA to YUL?

You'll have a choice of around 4 flights every day with United Airlines from Sea-Tac Airport to Montreal Airport.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Montréal--Trudeau, please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Seattle SEA to Montreal YUL

To find the best deals on flights to Seattle from Montreal with United, just enter your travel dates, filter by United, and hit search. You’ll find 1 flights to choose from and can sort by price, flight duration, and arrival or departure time.

Return flights from Seattle SEA to Montreal YUL with United

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $363 to $508, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply.

Book one-way United flights from Seattle SEA to Montreal YUL

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Seattle to Montreal costs from $224. Prices and availability subject to change. Additional terms may apply.

The easy way to find cheap flights to Montreal YUL from Seattle SEA with United

To find a cheap United flight from Seattle SEA to Montreal YUL, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference.

How to find our best airfare deals on United flights from Seattle SEA to Montreal YUL

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as September, or if you book a flight with a stopover.

Find nonstop flights from Seattle SEA to Montreal YUL with United

If you’re keen to be on Montreal soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around 11 hour(s) 9 min(s) – so you’ll be there before you know it.

Flexible airline tickets for United flights from Seattle SEA to Montreal YUL

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.

There are a lot of reasons to book your flights to Montreal YUL from Seattle SEA with United on Travelocity

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Airport code	Country	Airport name	Number of flights
ORD	USA	O'Hare Intl.	227
DEN	USA	Denver Intl.	226
IAH	USA	George Bush Intercontinental	136
IAD	USA	Washington Dulles Intl.	100
SFO	USA	San Francisco Intl.	64
LAX	USA	Los Angeles Intl.	23
EWR	USA	Liberty Intl.	20
FRA	DEU	Frankfurt Intl.	19
NRT	JPN	Narita Intl.	19
PEK	CHN	Capital Intl.	16

Travelers ❤️ these 🏨 after their flight to Montreal

Sheraton Montreal Airport Hotel

555 Boulevard McMillan, Dorval, QC

This hotel features a restaurant, a 24-hour gym, and a bar/lounge. Traveling on business? Take advantage of the business center, free WiFi in public areas, and ...

8.8/10 Excellent! (2,301 reviews)

Emplacement idéal près de l'aéroport

"J'y ai séjourné une nuit avec ma fille avant et après un voyage à l'étranger. Emplacement très pratique pour aller à l'aéroport! L'utilisation de la navette était simple. L'hôtel était très calme également, nous avons bien dormi. Excellent servi au restaurant Éclipse, autant le soir que le ..."

Reviewed on Jul 12, 2025

Aloft Montreal Airport

500 McMillan Ave., Dorval, QC

This hotel features an indoor pool and a 24-hour gym. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public areas, and free ...

8.6/10 Excellent! (1,649 reviews)

"It was very nice and quiet. Staff was friendly and helpful. Bed were perfect."

Reviewed on Jul 11, 2025

Hyatt Place Montreal Airport

690 MICHEL JASMIN, DORVAL, QC

This property features a restaurant, a 24-hour gym, and a bar/lounge. Guests will appreciate perks like free WiFi and a free airport shuttle. Self parking, a ...

9/10 Wonderful! (94 reviews)

"Very clean and well kept property interior and exterior. Great fitness room. Found the mattress uncomfortable."

Reviewed on Jul 11, 2025

Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

More Ways To Wander

Flights to Montreal

Montreal Hotels

Montreal Vacation Rentals

Montreal Car Rentals

Montreal Vacations

Things to do in Montreal

Popular United Flight Routes from SEA

Top United Flight Routes from YUL

Top Flights for United originating from SEA

Domestic

International

Most Popular

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.