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Cheap flights from San Francisco to Saint John from C$ 349

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YSJ
3 May — 10 May1
1 adult

Cheap flight deals from San Francisco to St John

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to St John (YSJ). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 April 2025.

Round-trip from

C$ 794

One-way from

C$ 349
United Airlines
  • United Airlines
  • 29/5-4/6
  • 3 total stops
  • 28h 53m total
  • San Francisco to Saint John
Search Deals
United Airlines
  • United Airlines
  • 29/6
  • 2 total stops
  • 16h 52m total
  • San Francisco to Saint John
Search Deals

Find flight deals from San Francisco to St John

Cheapest flights from San Francisco to St John
Explore the most affordable flight options available from San Francisco to St John. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2025.

Thu 29/512:43 a.m.SFO - YSJ
2 stops19h 06mUnited Airlines
Wed 4/65:25 a.m.YSJ - SFO
1 stop9h 47mUnited Airlines
Deal found 27/4C$ 794
Fri 30/56:30 a.m.SFO - YSJ
2 stops13h 19mMultiple Airlines
Wed 4/611:35 a.m.YSJ - SFO
2 stops14h 27mMultiple Airlines
Deal found 27/4C$ 809
Fri 30/58:15 a.m.SFO - YSJ
1 stop22h 34mAir Canada
Wed 4/65:25 a.m.YSJ - SFO
1 stop9h 47mAir Canada
Deal found 27/4C$ 826

Cheapflights Fare Finder

Customize your flight search to find flights from San Francisco to St John that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 April 2025.
Use the filters below to find and compare flights from San Francisco to Saint John that are best for you.

Fly from

San Francisco

Fly to

St John

Route

Depart

Return

Price

San FranciscoSaint John

SFO - YSJ

SFOYSJ

San Francisco

Thu 29/5

12:43 a.m.-11:49 p.m.

2 stops19h 06m

Saint John

Wed 4/6

5:25 a.m.-11:12 a.m.

1 stop9h 47m

C$ 794

San FranciscoSaint John

SFO - YSJ

SFOYSJ

San Francisco

Fri 30/5

6:30 a.m.-11:49 p.m.

2 stops13h 19m

Saint John

Wed 4/6

11:35 a.m.-10:02 p.m.

2 stops14h 27m

C$ 809

San FranciscoSaint John

SFO - YSJ

SFOYSJ

San Francisco

Fri 30/5

8:15 a.m.-10:49 a.m.

1 stop22h 34m

Saint John

Wed 4/6

5:25 a.m.-11:12 a.m.

1 stop9h 47m

C$ 826

San FranciscoSaint John

SFO - YSJ

SFOYSJ

San Francisco

Sun 29/6

9:15 p.m.-6:07 p.m.

2 stops16h 52m

C$ 349

San FranciscoSaint John

SFO - YSJ

SFOYSJ

San Francisco

Sun 29/6

10:56 p.m.-12:12 a.m.

1 stop21h 16m

C$ 461

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Best time to book a flight from San Francisco to St John

Have a flexible travel schedule? Discover the best time to fly to St John from San Francisco 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.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Saint John

Rainfall in St John by month

Plan your trip to St John by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Saint John ranges from 82.0 - 134.0 mm per month. November is typically the wettest month, when rainfall can reach 134.0 mm. August is typically the driest time to visit Saint John when rainfall is around 82.0 mm.

Temperature in St John by month

Plan your trip to St John by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Saint John, use this chart to help with planning. For those seeking warmer temperatures, July 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 -8.0 C).

Reviews of airlines servicing St John

Get insights into the airlines that provide service to St John. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St John. Reviews last updated 28 April 2025.
United Airlines
7.4
Good
8,694 reviews
Check prices

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,694 reviews
United Airlines
7.4
Good
8,694 reviews
Check prices

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,224 reviews
United Airlines
7.4
Good
8,694 reviews
Check prices

Entertainment

7.1

Overall

7.4

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from San Francisco to St John. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from San Francisco to St John that include hotel bookings?

    Yes. In addition to deals on San Francisco to St John flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to St John?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to St John.

  • Can I find deals for business class flights from San Francisco to St John?

    Yes. Cheapflights offers flight deals from San Francisco to St John by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Saint John?

    Currently, May is the cheapest month in which you can book a flight from San Francisco to Saint John (average of C$ 213). Flying from San Francisco to Saint John in December is currently the most expensive (average of C$ 461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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