How far in advance should I book tickets for a flight with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

Generally, when trying to get a below-average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 26 days before departure.

Is United Airlines the cheapest airline to fly with from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

With an average price of C$ 626 return, United Airlines is not the cheapest airline to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with. Instead, for the lowest price, our data suggests flying with Porter Airlines, where a return flight costs C$ 394 on average.

Does United Airlines fly direct to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport?

Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.

C$ 336 Cheap United Airlines Flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

YUL - SFO

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Flight Deals

Cheap United Airlines Flight Deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Tue, 10 Feb - Tue, 10 Feb

6:00 a.m. - 9:30 p.m.

YUL

SFO

18h 30m1 stop

11:55 p.m. - 1:28 p.m.

SFO

YUL

10h 33m1 stop

C$ 583United Airlines

Wed, 7 Jan - Sun, 11 Jan

9:15 a.m. - 5:50 p.m.

YUL

SFO

11h 35m2 stops

11:20 p.m. - 3:16 p.m.

SFO

YUL

12h 56m1 stop

C$ 592United Airlines

Sat, 10 Jan - Sat, 17 Jan

2:13 p.m. - 10:57 p.m.

YUL

SFO

11h 44m1 stop

11:55 p.m. - 1:28 p.m.

SFO

YUL

10h 33m1 stop

C$ 593United Airlines

Fri, 20 Feb - Thu, 26 Feb

2:13 p.m. - 11:17 p.m.

YUL

SFO

12h 04m2 stops

11:20 p.m. - 3:16 p.m.

SFO

YUL

12h 56m1 stop

C$ 594United Airlines

Sun, 8 Feb - Sun, 8 Feb

5:50 p.m. - 9:22 p.m.

YUL

SFO

6h 32mdirect

11:56 p.m. - 10:20 a.m.

SFO

YUL

7h 24m1 stop

C$ 667United Airlines

Tue, 17 Feb - Wed, 4 Mar

5:50 p.m. - 9:22 p.m.

YUL

SFO

6h 32mdirect

8:25 a.m. - 4:49 p.m.

SFO

YUL

5h 24mdirect

C$ 670United Airlines

Wed, 31 Dec - Mon, 12 Jan

5:25 p.m. - 7:40 a.m.

YUL

SFO

17h 15m1 stop

8:25 a.m. - 4:49 p.m.

SFO

YUL

5h 24mdirect

C$ 674United Airlines

Wed, 31 Dec - Fri, 16 Jan

5:25 p.m. - 7:40 a.m.

YUL

SFO

17h 15m1 stop

11:20 p.m. - 11:30 a.m.

SFO

YUL

9h 10m1 stop

C$ 676United Airlines

Wed, 24 Dec - Mon, 12 Jan

5:50 p.m. - 9:22 p.m.

YUL

SFO

6h 32mdirect

12:43 a.m. - 5:55 p.m.

SFO

YUL

14h 12m2 stops

C$ 709United Airlines

Fri, 13 Feb - Sun, 22 Feb

6:00 a.m. - 5:45 p.m.

YUL

SFO

14h 45m2 stops

9:20 p.m. - 2:00 p.m.

SFO

YUL

13h 40m2 stops

C$ 714United Airlines

Useful Info

Low season	November
High season	July
Cheapest flight	C$ 336
Average price round-trip	C$ 718

Best time to beat the crowds but there is an average 65% increase in price.

Most popular time to fly and prices are also 1% lower on average.

Flight from Montreal to San Francisco

(price for this month)

When to Book Flights with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Average price per month

Flight prices as travel date approaches

How far in advance should I book tickets for a flight with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?
Generally, when trying to get a below-average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 26 days before departure.
Is United Airlines the cheapest airline to fly with from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?
With an average price of C$ 626 return, United Airlines is not the cheapest airline to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with. Instead, for the lowest price, our data suggests flying with Porter Airlines, where a return flight costs C$ 394 on average.
What is the cheapest United Airlines flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?
In the last 3 days, the lowest price for a flight with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco was C$ 577 for a return flight and C$ 381 for a one-way flight.
Does United Airlines fly direct to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport?
Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.
What’s the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines?
On average, the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines is Tuesday, when prices are around C$ 252. The most expensive day is generally Saturday, when the average price is around C$ 346.
What’s the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines?
The cheapest month for United Airlines flights to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport is generally September, where plane tickets cost C$ 313 on average. If possible, try to avoid the most expensive months of August and November, when tickets cost C$ 814 and C$ 816 respectively.

7.4

Good9,095 verified ratings

7.7Boarding

7.1Entertainment

8.1Crew

6.6Food

7.3Comfort

Pros +

Flight was quick and easy. (in 2447 reviews)

Cons -

Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)
Also no entertainment (in 1245 reviews)

Show reviews that mention

10.0 Wonderful

Bill, Dec 2025

LHR

IAH

Staff on board was excellent. Positive upbeat helpful- like it used to be.

8.0 Very good

Eurico Hiromitsu, Dec 2025

ORD

GRU

Razoavel

8.0 Very good

Eurico Hiromitsu, Dec 2025

HND

ORD

Razoavel

10.0 Wonderful

Michele, Dec 2025

RSW

ORD

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

4.0 Mediocre

David, Dec 2025

AUA

EWR

For an expensive flight to another country, United has a lot of nerve serving pretzels and no meals (unless, of course, you want to buy something to eat). Unacceptable.

8.0 Very good

Steven, Dec 2025

SAN

DEN

The seats are not comfortable and cramped

10.0 Wonderful

Verified traveller, Dec 2025

MCI

IAH

It was great. No change

2.0 Poor

Thrinadh Kumar, Dec 2025

ORD

YYZ

Flight delayed alot

4.0 Mediocre

Thrinadh Kumar, Dec 2025

OGG

ORD

Flight delayed than usual time

10.0 Wonderful

Mohamad, Dec 2025

NRT

KUL

Amazing

Everything you need to know for your flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

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United Airlines flights

Other airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Porter Airlines flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Air Canada flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

YUL - SFO

C$ 336 Find Cheap United Airlines Flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Search hundreds of travel sites at once for deals on United Airlines flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Cheap United Airlines Flight Deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Recent round-trip United Airlines flight deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Recent one-way United Airlines flight deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Recent last minute United Airlines flight deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Recent direct United Airlines flight deals from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Good to know

When to Book Flights with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

FAQs for flying to San Francisco with United Airlines

How far in advance should I book tickets for a flight with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

Generally, when trying to get a below-average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 26 days before departure.

Is United Airlines the cheapest airline to fly with from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

With an average price of C$ 626 return, United Airlines is not the cheapest airline to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with. Instead, for the lowest price, our data suggests flying with Porter Airlines, where a return flight costs C$ 394 on average.

What is the cheapest United Airlines flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

In the last 3 days, the lowest price for a flight with United Airlines from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco was C$ 577 for a return flight and C$ 381 for a one-way flight.

Does United Airlines fly direct to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport?

Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.

What’s the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines?

On average, the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines is Tuesday, when prices are around C$ 252. The most expensive day is generally Saturday, when the average price is around C$ 346.

What’s the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco with United Airlines?

United Airlines Customer Reviews

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Everything you need to know for your flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Other airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

Flight deals from the most popular airlines with KAYAK users flying the route

Cabin class types available on flights to San Francisco

Cabin classes available on flights to Montreal Pierre Elliott Trudeau Intl Airport. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to San Francisco with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.