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 8 days before departure. For the cheapest possible price, our data suggests booking 69 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$ 603 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 WestJet, where a return flight costs C$ 385 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$ 266 Cheap United Airlines Flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

YUL - SFO

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

...and more

Travellers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals

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

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, 31 Mar - Wed, 8 Apr

4:55 p.m. - 10:40 p.m.

YUL

SFO

8h 45m

1 stop

11:20 p.m. - 2:40 p.m.

SFO

YUL

12h 20m

1 stop

C$ 448United Airlines

Wed, 1 Apr - Wed, 8 Apr

4:55 p.m. - 12:19 a.m.

YUL

SFO

10h 24m

1 stop

9:30 p.m. - 2:40 p.m.

SFO

YUL

14h 10m

1 stop

C$ 449United Airlines

Tue, 21 Jul - Mon, 27 Jul

6:30 p.m. - 9:45 p.m.

YUL

SFO

6h 15mdirect

11:30 p.m. - 10:38 a.m.

SFO

YUL

8h 08m

1 stop

C$ 461United Airlines

Thu, 23 Jul - Fri, 31 Jul

9:45 a.m. - 12:30 a.m.

YUL

SFO

17h 45m

1 stop

11:45 p.m. - 8:15 a.m.

SFO

YUL

5h 30mdirect

C$ 468United Airlines

Tue, 14 Apr - Fri, 17 Apr

11:23 a.m. - 5:48 p.m.

YUL

SFO

9h 25m

1 stop

10:50 p.m. - 10:40 a.m.

SFO

YUL

8h 50m

1 stop

C$ 489United Airlines

Tue, 7 Apr - Tue, 14 Apr

6:35 p.m. - 1:17 a.m.

YUL

SFO

9h 42m

1 stop

11:52 p.m. - 10:40 a.m.

SFO

YUL

7h 48m

1 stop

C$ 490United Airlines

Wed, 13 May - Mon, 18 May

8:10 a.m. - 11:25 a.m.

YUL

SFO

6h 15mdirect

11:55 p.m. - 1:09 p.m.

SFO

YUL

10h 14m

1 stop

C$ 525United Airlines

Thu, 9 Apr - Wed, 15 Apr

6:00 p.m. - 9:21 p.m.

YUL

SFO

6h 21mdirect

11:55 p.m. - 1:09 p.m.

SFO

YUL

10h 14m

1 stop

C$ 527United Airlines

Fri, 3 Apr - Mon, 6 Apr

5:00 p.m. - 7:16 a.m.

YUL

SFO

17h 16m

1 stop

11:05 p.m. - 12:02 p.m.

SFO

YUL

9h 57m

1 stop

C$ 534United Airlines

Thu, 9 Apr - Wed, 15 Apr

6:35 p.m. - 1:17 a.m.

YUL

SFO

9h 42m

1 stop

11:55 p.m. - 1:09 p.m.

SFO

YUL

10h 14m

1 stop

C$ 539United Airlines

Useful Info

Low season	November
High season	July
Cheapest flight	C$ 266
Average price round-trip	C$ 1,083

Best time to beat the crowds but there is an average 53% increase in price.

Most popular time to fly and prices are also 6% 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 8 days before departure. For the cheapest possible price, our data suggests booking 69 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$ 603 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 WestJet, where a return flight costs C$ 385 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$ 473 for a return flight and C$ 465 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$ 250. The most expensive day is generally Saturday, when the average price is around C$ 344.
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$ 310 on average. If possible, try to avoid the most expensive months of August and November, when tickets cost C$ 805 and C$ 808 respectively.

7.4

Good9,319 verified ratings

6.6Food

7.7Boarding

8.1Crew

7.1Entertainment

7.3Comfort

6.0 Okay

George, Feb 2026

SFO

PSP

it was a very short flight so my expectations were low.

6.0 Okay

Verified traveller, Feb 2026

PTY

IAH

Good until I was put on air canada flight Houston Vancouver not even one cookie

10.0 Wonderful

Virginie, Feb 2026

ZRH

MIA

This is the best airline company on this planet!!!

2.0 Poor

Verified traveller, Feb 2026

GUM

HNL

So bad, flight was been cancelled due to aircraft problem, so ended up buying anothet ticket.

10.0 Wonderful

Wayne, Feb 2026

LIH

DEN

As great a red-eye flight as red-eye flights can be.

10.0 Wonderful

Thomas W., Feb 2026

ATL

IAH

Better plane on short flight than Øn longer flights

8.0 Very good

Verified traveller, Feb 2026

EWR

EDI

Once boarding started it was pretty quick. Food was inedible; cold and salty..

6.0 Okay

Osman, Feb 2026

SJJ

VIE

Okay

10.0 Wonderful

Courtney, Feb 2026

ORD

ORF

Better instructions to connect to entertainment via bluetooth earpods.

8.0 Very good

Leslie, Feb 2026

SFO

YYZ

Entertainment kept turning itself off. Gave up on watching a movie.

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

Airlines

Cabin class

Complete your trip

Flights to other cities

Return flight deals

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$ 266 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 8 days before departure. For the cheapest possible price, our data suggests booking 69 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$ 603 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 WestJet, where a return flight costs C$ 385 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$ 473 for a return flight and C$ 465 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$ 250. The most expensive day is generally Saturday, when the average price is around C$ 344.

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

United Airlines Customer Reviews

Traveler rating:

Sort by:

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.

Find deals for your return flight

Top United Airlines flights

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.