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Cheap flights from Saint John to Key Largo from C$ 382

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
10 Apr — 17 Apr1
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 11 March 2026.

Tue 26/54:30 p.m.
YSJ
-
MIA
1 stop6h 47m
Air Canada
Sat 30/58:05 a.m.
MIA
-
YSJ
1 stop6h 35m
Air Canada
Deal found 6/3C$ 705
Sun 2/84:30 p.m.
YSJ
-
MIA
1 stop6h 41m
Air Canada
Thu 6/88:15 a.m.
MIA
-
YSJ
1 stop6h 35m
Air Canada
Deal found 8/3C$ 725
Fri 8/54:30 p.m.
YSJ
-
MIA
1 stop6h 47m
Air Canada
Sun 17/57:15 a.m.
MIA
-
YSJ
1 stop7h 25m
Air Canada
Deal found 8/3C$ 745
Tue 26/55:35 a.m.
YSJ
-
MIA
2 stops11h 12m
United Airlines
Sat 30/58:48 a.m.
MIA
-
YSJ
3 stops14h 04m
United Airlines
Deal found 6/3C$ 783

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 11 March 2026.

Round-trip from

C$ 705

One-way from

C$ 382

Popular in

December

Cheapest in

July

Average price

C$ 1,029
Air Canada
  • Air Canada
  • 26/5-30/5
  • 2 total stops
  • 13h 22m total
  • Saint John to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 22/4
  • 1 total stop
  • 6h 43m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 11 March 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

Tue 26/5

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

1 stop6h 47m

Miami

Sat 30/5

8:05 a.m.-3:40 p.m.

1 stop6h 35m

C$ 705

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Tue 26/5

5:35 a.m.-3:47 p.m.

2 stops11h 12m

Miami

Sat 30/5

8:48 a.m.-11:52 p.m.

3 stops14h 04m

C$ 783

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sun 2/8

5:40 a.m.-8:33 p.m.

2 stops15h 53m

Miami

Thu 6/8

12:30 p.m.-11:50 p.m.

2 stops10h 20m

C$ 787
Cheapest one-way

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Wed 22/4

11:55 a.m.-11:22 p.m.

2 stops12h 27m

C$ 429
Quickest one-way

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 23/4

5:35 a.m.-4:16 p.m.

2 stops11h 41m

C$ 441

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Wed 22/4

12:00 p.m.-12:49 a.m.

3 stops37h 49m

C$ 527

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

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

What is the cheapest month to book a flight from Saint John to Key Largo?

Currently, March is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 244). Flying from Saint John to Key Largo in October is currently the most expensive (average of C$ 506). 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 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 11 March 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
10,800 reviews
Check prices

Overall

7.1

Crew

7.8

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

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
10,800 reviews
Air Canada
7.1
Good
10,800 reviews
Check prices

Overall

7.1

Crew

7.8

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

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 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.

  • What is the cheapest month to book a flight from Saint John to Key Largo?

    Currently, March is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 244). Flying from Saint John to Key Largo in October is currently the most expensive (average of C$ 506). 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

Browse thousands of different options on Cheapflights for your next trip

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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 11 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 551AverageC$ 756FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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