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Cheap flights from Saint John to Key Largo from C$ 421

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
13 Jul — 20 Jul1
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 13 June 2026.

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 8/6C$ 700
Mon 13/74:40 p.m.
YSJ
-
MIA
1 stop6h 31m
Air Canada
Tue 14/78:15 a.m.
MIA
-
YSJ
1 stop6h 30m
Air Canada
Deal found 12/6C$ 795
Sat 27/64:35 p.m.
YSJ
-
MIA
1 stop6h 36m
Air Canada
Tue 30/67:15 a.m.
MIA
-
YSJ
1 stop7h 40m
Air Canada
Deal found 13/6C$ 798
Mon 13/74:40 p.m.
YSJ
-
MIA
2 stops19h 44m
United Airlines
Tue 14/75:32 p.m.
MIA
-
YSJ
2 stops21h 13m
United Airlines
Deal found 8/6C$ 805
Mon 24/84:40 p.m.
YSJ
-
MIA
1 stop6h 31m
Air Canada
Mon 31/89:45 p.m.
MIA
-
YSJ
1 stop13h 10m
Air Canada
Deal found 12/6C$ 846
Sat 4/712:50 p.m.
YSJ
-
MIA
1 stop8h 58m
Air Canada
Mon 13/78:15 a.m.
MIA
-
YSJ
1 stop6h 30m
Air Canada
Deal found 9/6C$ 890

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 13 June 2026.

Round-trip from

C$ 700

One-way from

C$ 421
Air Canada
  • Air Canada
  • 2/8-6/8
  • 2 total stops
  • 14h 48m total
  • Saint John to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 17/9
  • 1 total stop
  • 6h 37m total
  • Saint John to Key Largo
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 13 June 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

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$ 700
Quickest round-trip

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 13/7

4:40 p.m.-10:11 p.m.

1 stop6h 31m

Miami

Tue 14/7

8:15 a.m.-3:45 p.m.

1 stop6h 30m

C$ 795

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 13/7

4:40 p.m.-11:24 a.m.

2 stops19h 44m

Miami

Tue 14/7

5:32 p.m.-3:45 p.m.

2 stops21h 13m

C$ 805

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 24/8

4:40 p.m.-10:11 p.m.

1 stop6h 31m

Miami

Mon 31/8

9:45 p.m.-11:55 a.m.

1 stop13h 10m

C$ 846

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 27/7

4:40 p.m.-10:11 p.m.

1 stop6h 31m

Miami

Mon 3/8

9:45 p.m.-11:50 a.m.

1 stop13h 05m

C$ 938
Cheapest one-way
Quickest one-way

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 17/9

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

1 stop6h 37m

C$ 421

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sun 5/7

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

1 stop8h 13m

C$ 443

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 17/9

4:40 p.m.-11:54 a.m.

2 stops20h 14m

C$ 479

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sun 5/7

5:00 a.m.-10:27 p.m.

2 stops18h 27m

C$ 590

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 17/9

6:55 a.m.-6:29 p.m.

3 stops12h 34m

C$ 784

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/6

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 13 June 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
11,172 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Crew

7.8

Food

6.3

Comfort

7.1

Overall

7.1

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
11,172 reviews
Air Canada
7.1
Good
11,172 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Crew

7.8

Food

6.3

Comfort

7.1

Overall

7.1

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 8h 13m. 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 13 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 568AverageC$ 995FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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.

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