United Airlines flights from Toronto to San Francisco (YTO - SFO)

YTO — SFO
26 Apr — 3 May1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from Toronto to San Francisco on United Airlines typically fly into San Francisco and depart from Toronto Pearson Intl. Select your dates above for pricing.

United Airlines flights from Toronto to San Francisco in 2026

Find detailed information about United Airlines flights from Toronto to San Francisco. Explore the options provided by United Airlines to plan your journey from Toronto to San Francisco. Data last updated 27 March 2026.

One-way from

C$ 279

Round-trip from

C$ 484

Popular in

December

Cheapest in

April

Average price (all airlines)

C$ 566
United Airlines
  • United Airlines
  • 30/4
  • Nonstop
  • 5h 53m total
  • Toronto to San Francisco
United Airlines
  • United Airlines
  • 11/4-19/4
  • Nonstop
  • 11h 03m total
  • Toronto to San Francisco
Highest demand for flights from Toronto to San Francisco; 3% potential price increase.
Best time to find cheap flights from Toronto to San Francisco; 2% potential price drop.
Average price for all Toronto to San Francisco flights (one-way and round-trip).
  • How do most travelers feel about United Airlines?

    9,491 Cheapflights users have left reviews for United Airlines and have rated the airline 7.4/10. If you are looking to travel from Toronto to San Francisco on United Airlines, input your dates in the form above for our best prices!

  • Can I get a flight from Toronto to San Francisco on United Airlines for under C$ 692?

    Toronto to San Francisco flights on United Airlines are currently available under C$ 692. 18 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.

Find United Airlines flight deals from Toronto to San Francisco

Enter your travel dates to find the best prices.

Cheapest United Airlines flights from Toronto to San Francisco
Explore the most affordable United Airlines flight options available from Toronto to San Francisco. Find the lowest fares with prices last updated on 27 March 2026.

Sat 11/46:30 a.m.
YYZ
-
SFO
Nonstop5h 53m
United Airlines
Sun 19/48:04 a.m.
SFO
-
YYZ
Nonstop5h 10m
United Airlines
Deal found 27/3C$ 484
Mon 6/46:30 a.m.
YYZ
-
SFO
Nonstop5h 53m
United Airlines
Thu 9/48:04 a.m.
SFO
-
YYZ
Nonstop5h 10m
United Airlines
Deal found 23/3C$ 486
Fri 10/46:30 a.m.
YYZ
-
SFO
Nonstop5h 53m
United Airlines
Mon 13/48:04 a.m.
SFO
-
YYZ
Nonstop5h 10m
United Airlines
Deal found 25/3C$ 487

How far ahead should I book a flight from Toronto to San Francisco with United Airlines?

Use this chart to determine the optimal time to book a round-trip flight from Toronto to San Francisco. Price data was last updated on 20 March 2026.

Booking with United Airlines 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Toronto to San Francisco with United Airlines?

Currently, the most affordable month to book a United Airlines flight from Toronto to San Francisco in May, with an average price of C$ 317. Conversely, traveling with United Airlines from Toronto to San Francisco in September will be the most expensive, with an average cost of C$ 473. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Best time to book a flight from Toronto to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Toronto with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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Fly from Toronto to San Francisco on another airline

Consider alternative airlines that service the San Francisco area. Flight routes are based on user searches made on Cheapflights and were last updated on 27 March 2026.

See what others are saying about United Airlines

Read reviews and see what other travellers are saying about their experiences with United Airlines. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing United Airlines for your next flight. Reviews last updated 27 March 2026.
United Airlines
7.4
Good
9,491 reviews
Overview

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

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