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Cheap flights from London, ON to Saint John from C$ 804

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — YSJ
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to St John

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) 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 October 2025.

Round-trip from

C$ 804

Popular in

March

Cheapest in

January

Average price

C$ 1,687
Air Canada
  • Air Canada
  • 18/12-25/12
  • 2 total stops
  • 11h 04m total
  • London to Saint John
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 305 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 107 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from London to St John

Enter your travel dates to find the best prices.

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

Thu 18/125:10 a.m.YXU - YSJ
2 stops9h 23mAir Canada
Thu 25/1211:30 a.m.YSJ - YXU
1 stop6h 35mAir Canada
Deal found 27/10C$ 804
Mon 24/115:15 a.m.YXU - YSJ
2 stops9h 18mAir Canada
Fri 28/1111:45 a.m.YSJ - YXU
1 stop6h 20mAir Canada
Deal found 27/10C$ 827
Wed 26/115:15 a.m.YXU - YSJ
2 stops9h 18mAir Canada
Sat 29/1111:45 a.m.YSJ - YXU
1 stop6h 20mAir Canada
Deal found 27/10C$ 867
Wed 26/115:15 a.m.YXU - YSJ
1 stop4h 44mAir Canada
Fri 28/114:15 p.m.YSJ - YXU
2 stops30h 06mAir Canada
Deal found 27/10C$ 899
Wed 19/115:15 a.m.YXU - YSJ
2 stops9h 18mAir Canada
Mon 24/1111:45 a.m.YSJ - YXU
1 stop6h 20mAir Canada
Deal found 27/10C$ 912
Wed 26/115:15 a.m.YXU - YSJ
1 stop4h 44mAir Canada
Wed 26/114:15 p.m.YSJ - YXU
2 stops17h 31mAir Canada
Deal found 27/10C$ 940
Wed 26/115:15 a.m.YXU - YSJ
2 stops9h 18mAir Canada
Thu 27/114:15 p.m.YSJ - YXU
2 stops41h 31mAir Canada
Deal found 27/10C$ 945
Sat 22/115:15 a.m.YXU - YSJ
1 stop4h 44mAir Canada
Thu 27/115:40 a.m.YSJ - YXU
1 stop4h 06mAir Canada
Deal found 27/10C$ 951
Sun 23/115:15 a.m.YXU - YSJ
1 stop4h 44mAir Canada
Fri 28/114:15 p.m.YSJ - YXU
2 stops30h 06mAir Canada
Deal found 27/10C$ 985

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 October 2025.
Use the filters below to find and compare flights from London to Saint John that are best for you.

Fly from

London

Fly to

St John

Route

Depart

Return

Price

LondonSaint John

YXU - YSJ

YXUYSJ

London

Thu 18/12

5:10 a.m.-10:39 a.m.

1 stop4h 29m

Saint John

Thu 25/12

11:30 a.m.-5:05 p.m.

1 stop6h 35m

C$ 804

LondonSaint John

YXU - YSJ

YXUYSJ

London

Mon 24/11

5:15 a.m.-10:59 a.m.

1 stop4h 44m

Saint John

Fri 28/11

11:45 a.m.-5:05 p.m.

1 stop6h 20m

C$ 827

LondonSaint John

YXU - YSJ

YXUYSJ

London

Wed 26/11

5:15 a.m.-10:59 a.m.

1 stop4h 44m

Saint John

Sat 29/11

11:45 a.m.-5:05 p.m.

1 stop6h 20m

C$ 867

LondonSaint John

YXU - YSJ

YXUYSJ

London

Wed 26/11

5:15 a.m.-10:59 a.m.

1 stop4h 44m

Saint John

Thu 27/11

5:40 a.m.-8:46 a.m.

1 stop4h 06m

C$ 867

LondonSaint John

YXU - YSJ

YXUYSJ

London

Wed 26/11

5:15 a.m.-10:59 a.m.

1 stop4h 44m

Saint John

Fri 28/11

5:40 a.m.-5:05 p.m.

1 stop12h 25m

C$ 899

LondonSaint John

YXU - YSJ

YXUYSJ

London

Wed 26/11

5:15 a.m.-3:33 p.m.

2 stops9h 18m

Saint John

Sun 30/11

4:15 p.m.-8:46 a.m.

2 stops17h 31m

C$ 899

LondonSaint John

YXU - YSJ

YXUYSJ

London

Wed 19/11

5:15 a.m.-10:59 a.m.

1 stop4h 44m

Saint John

Mon 24/11

11:45 a.m.-5:05 p.m.

1 stop6h 20m

C$ 912

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Best time to book a flight from London to St John

Have a flexible travel schedule? Discover the best time to fly to St John from London 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 London to Saint John

What is the cheapest month to book a flight from London, Ontario to Saint John?

Currently, August is the cheapest month in which you can book a flight from London, Ontario to Saint John (average of C$ 112). Flying from London, Ontario to Saint John in March is currently the most expensive (average of C$ 340). 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.

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 October 2025.
Check out reviews from past customers who have flown with Air Canada from London to Saint John to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,371 reviews
Check prices

Boarding

7.3

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.3

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,371 reviews
Air Canada
7.1
Good
10,371 reviews
Check prices

Boarding

7.3

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.3

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

Related info for your journey

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

  • How long is the flight from London, Ontario to Saint John?

    There are many flights that can get you from London, Ontario to Saint John in 4h 29m. Fly via Air Canada to get the fastest option. Airlines will cover a distance of 1241 km.

  • What is the cheapest airline to fly from London, Ontario to Saint John round-trip?

    Cheapflights users have booked flights from London, Ontario to Saint John round-trip from C$ 1,045. Air Canada is 23% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 London, Ontario to Saint John?

    Currently, August is the cheapest month in which you can book a flight from London, Ontario to Saint John (average of C$ 112). Flying from London, Ontario to Saint John in March is currently the most expensive (average of C$ 340). 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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Top airline flying from London to St John

Discover the top airline that operate flights from London to St John. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,045AverageC$ 1,240FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from London to St John?

Cheapflights makes it easy to find London to St John flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from London to St John?

Millions of users choose and trust Cheapflights to book the best flight deals from London to St John for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from London to St John with no change fees?

Certainly. Search results for flights to St John from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to St John become cheaper?

Not ready to book yet? You can track prices for flights from London to St John on Cheapflights with our Price Alert feature and get notified when better prices are available.

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