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Cheap flights from Saint John to Key Largo from C$ 389

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
26 May — 2 Jun1
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
Explore the most affordable flight options available from St John to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 April 2026.

Mon 8/64:30 p.m.
YSJ
-
MIA
1 stop6h 47m
Air Canada
Wed 10/68:05 a.m.
MIA
-
YSJ
1 stop6h 45m
Air Canada
Deal found 24/4C$ 697
Sun 2/85:00 a.m.
YSJ
-
MIA
1 stop8h 13m
Air Canada
Thu 6/88:15 a.m.
MIA
-
YSJ
1 stop6h 35m
Air Canada
Deal found 25/4C$ 704
Sun 29/114:20 p.m.
YSJ
-
MIA
1 stop7h 09m
Air Canada
Sat 5/128:00 a.m.
MIA
-
YSJ
1 stop6h 40m
Air Canada
Deal found 22/4C$ 707
Tue 9/64:30 p.m.
YSJ
-
MIA
1 stop6h 47m
Air Canada
Tue 16/69:45 p.m.
MIA
-
YSJ
1 stop25h 07m
Air Canada
Deal found 25/4C$ 739

Find flight deals from St John to Key Largo

Keep the following information in mind while searching for St John to Key Largo flight deals. Data was last updated 26 April 2026.

Round-trip from

C$ 697

One-way from

C$ 389

Popular in

April

Cheapest in

July

Average price

C$ 1,347
Air Canada
  • Air Canada
  • 8/6-10/6
  • 2 total stops
  • 13h 32m total
  • Saint John to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 8/6
  • 1 total stop
  • 6h 47m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 30% potential increase in price (C$ 492 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 72 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St John to Key Largo 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 26 April 2026.
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 - MIA

YSJMIA

Saint John

Mon 8/6

4:30 p.m.-10:17 p.m.

1 stop6h 47m

Miami

Wed 10/6

8:05 a.m.-3:50 p.m.

1 stop6h 45m

C$ 698

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sun 2/8

5:00 a.m.-12:13 p.m.

1 stop8h 13m

Miami

Thu 6/8

8:15 a.m.-3:50 p.m.

1 stop6h 35m

C$ 704

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 8/6

5:35 a.m.-10:27 p.m.

2 stops17h 52m

Miami

Wed 10/6

7:07 a.m.-11:52 p.m.

2 stops15h 45m

C$ 876
Cheapest one-way
Quickest one-way

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 8/6

4:30 p.m.-10:17 p.m.

1 stop6h 47m

C$ 389

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 8/6

10:45 a.m.-1:04 p.m.

2 stops27h 19m

C$ 391

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 6/6

4:30 p.m.-10:17 p.m.

1 stop6h 47m

C$ 425

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 6/6

12:20 p.m.-11:22 p.m.

2 stops12h 02m

C$ 450

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/4

Sorted by cheapest first

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
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 Saint John to Key Largo
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated 26 April 2026.
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
10,974 reviews
Check prices

Entertainment

6.8

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Food

6.3

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.
Air Canada
7.1
Good
10,974 reviews
Air Canada
7.1
Good
10,974 reviews
Check prices

Entertainment

6.8

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Food

6.3

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.

Related info for your journey

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

  • 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 6h 47m. Fly via Air Canada to get the fastest option. The distance between Saint John and Key Largo is about 2522 km.

  • 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

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Top airline flying from St John to Key Largo

Discover the top airline that operate flights from St John to Key Largo. 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 26 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 555AverageC$ 870FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

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

Certainly. Search results for flights to Key Largo from St John 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 St John to Key Largo become cheaper?

Yes! Start tracking prices for St John to Key Largo flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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