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Cheap flights from Saint John to Key Largo from C$ 449

YSJ — MIA
11 Oct — 18 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St John to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from St John to Key Largo

Tue 8/126:00 p.m. -
1 stop7h 24m
Thu 10/127:25 a.m. -
1 stop8h 54m
Deal found 6/9C$ 833
Sun 25/105:00 a.m. -
1 stop7h 09m
Sun 1/117:20 a.m. -
1 stop8h 59m
Deal found 10/9C$ 922
Tue 8/125:20 a.m. -
3 stops17h 56m
Thu 10/1212:18 p.m. -
2 stops10h 06m
Deal found 9/9C$ 988

Find flight deals from St John to Key Largo

Round-trip from

C$ 833

One-way from

C$ 449

Popular in

March

Cheapest in

January

Average price

C$ 941
Air Canada
  • Air Canada
  • 8/12-10/12
  • 2 total stops
  • 16h 18m total
  • Saint John to Key Largo
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Air Canada
  • Air Canada
  • 21/10-31/12
  • 1 total stop
  • 6h 37m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 304 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Saint John to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Wed 21/10

4:40 p.m.-10:17 p.m.

1 stop6h 37m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 449

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Wed 21/10

5:00 a.m.-6:52 p.m.

3 stops14h 52m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 566

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Tue 6/10

4:40 p.m.-12:25 a.m.

2 stops8h 45m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 571

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Tue 6/10

5:00 a.m.-6:52 p.m.

3 stops14h 52m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 640

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Fri 9/10

5:00 a.m.-8:49 p.m.

1 stop16h 49m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 670

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Fri 9/10

10:45 a.m.-9:35 a.m.

2 stops47h 50m

Miami

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 689

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Tue 8/12

11:05 a.m.-8:19 p.m.

2 stops10h 14m

Miami

Thu 10/12

7:25 a.m.-5:19 p.m.

1 stop8h 54m

C$ 839

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Sun 25/10

5:00 a.m.-11:09 a.m.

1 stop7h 09m

Miami

Sun 1/11

7:20 a.m.-5:19 p.m.

1 stop8h 59m

C$ 922

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Sun 25/10

5:00 a.m.-10:15 p.m.

2 stops18h 15m

Miami

Sun 1/11

8:51 a.m.-11:24 p.m.

2 stops13h 33m

C$ 988

Saint JohnMiami

YSJ Saint John - MIA Miami

YSJMIA

Saint John

Tue 8/12

5:20 a.m.-10:16 p.m.

3 stops17h 56m

Miami

Thu 10/12

12:18 p.m.-11:24 p.m.

2 stops10h 06m

C$ 988

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 11 resultsSorted by cheapest first
1
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Best time to book a flight from St John to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from St John with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Saint John to Key Largo

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Key Largo

See what other customers who have flown with Air Canada from Saint John to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,611 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Air Canada
7.1
Good
11,611 reviews
Air Canada
7.1
Good
11,611 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

Related info for your journey

  • What airport do you fly from for flights from Saint John to Key Largo?

    Most people fly from Saint John (YSJ) if they book a flight from Saint John to Key Largo. On average, Saint John has 0 outbound flights to Key Largo per day from 1 airline. Saint John is conveniently located just 15.1 km from Saint John’s city centre.

  • How long is the flight from Saint John to Key Largo?

    There are many flights that can get you from Saint John to Key Largo in 10h 14m. Fly via Air Canada or United Airlines to get the fastest option. The distance between Saint John and Key Largo is about 2522 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from St John to Key Largo

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 581AverageC$ 1,108FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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