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Cheap flights from Saint John to Key Largo from C$ 414

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 31/10. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 17 September 2025.

Round-trip from

C$ 611

One-way from

C$ 414

Popular in

December

Cheapest in

July

Average price

C$ 984
Air Canada
  • Air Canada
  • 22/11-9/12
  • 3 total stops
  • 18h 10m total
  • Saint John to Key Largo
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Air Canada
  • Air Canada
  • 31/10
  • 1 total stop
  • 11h 34m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from St John to Key Largo

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 17 September 2025.

Sat 22/1111:55 a.m.YSJ - MIA
2 stops9h 21mAir Canada
Tue 9/127:25 a.m.MIA - YSJ
1 stop8h 49mAir Canada
Deal found 16/9C$ 611
Fri 21/1111:55 a.m.YSJ - MIA
1 stop11h 34mAir Canada
Sat 29/119:05 p.m.MIA - YSJ
2 stops13h 10mAir Canada
Deal found 16/9C$ 681
Fri 21/115:40 a.m.YSJ - MIA
2 stops18h 24mMultiple Airlines
Sat 29/119:05 p.m.MIA - YSJ
2 stops13h 10mMultiple Airlines
Deal found 16/9C$ 714
Thu 25/95:55 a.m.YSJ - MIA
2 stops16h 18mUnited Airlines
Tue 30/96:00 a.m.MIA - YSJ
2 stops10h 46mUnited Airlines
Deal found 16/9C$ 719
Wed 24/96:40 p.m.YSJ - MIA
2 stops20h 37mAir Canada
Tue 30/97:53 p.m.MIA - YSJ
2 stops20h 47mAir Canada
Deal found 16/9C$ 726
Fri 21/115:40 a.m.YSJ - MIA
2 stops18h 24mUnited Airlines
Sat 29/116:05 a.m.MIA - YSJ
2 stops10h 09mUnited Airlines
Deal found 16/9C$ 1,063

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 17 September 2025.
Use the filters below to find and compare flights from Saint John to Key Largo that are best for you.

Fly from

St John

Fly to

Key Largo

Route

Depart

Return

Price

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 22/11

11:55 a.m.-8:16 p.m.

2 stops9h 21m

Miami

Tue 9/12

7:25 a.m.-5:14 p.m.

1 stop8h 49m

C$ 611

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 30/10

11:55 a.m.-8:16 p.m.

2 stops9h 21m

Miami

Thu 6/11

9:05 p.m.-11:24 p.m.

1 stop25h 19m

C$ 631

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 21/11

11:55 a.m.-10:29 p.m.

1 stop11h 34m

Miami

Sat 29/11

9:05 p.m.-11:15 a.m.

2 stops13h 10m

C$ 681

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 21/11

5:40 a.m.-11:04 p.m.

2 stops18h 24m

Miami

Sat 29/11

9:05 p.m.-11:15 a.m.

2 stops13h 10m

C$ 714

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 30/10

5:40 a.m.-11:04 p.m.

2 stops18h 24m

Miami

Thu 6/11

9:00 a.m.-11:24 p.m.

2 stops13h 24m

C$ 751

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 26/2

6:15 p.m.-6:16 p.m.

2 stops25h 01m

Miami

Sun 8/3

6:53 p.m.-5:14 p.m.

2 stops21h 21m

C$ 964

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 26/2

11:55 a.m.-5:29 p.m.

1 stop6h 34m

Miami

Sun 8/3

9:05 p.m.-11:15 a.m.

2 stops13h 10m

C$ 1,010

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Thu 30/10

12:00 p.m.-1:09 p.m.

2 stops26h 09m

Miami

Thu 6/11

11:07 a.m.-3:45 p.m.

3 stops27h 38m

C$ 1,036

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 31/10

11:55 a.m.-10:29 p.m.

1 stop11h 34m

C$ 414

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 31/10

5:40 a.m.-10:00 p.m.

2 stops17h 20m

C$ 426

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 11 results
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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
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, April is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 251). Flying from Saint John to Key Largo in August is currently the most expensive (average of C$ 369). 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.

How much does it cost to fly round-trip from Saint John to Key Largo?

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 17 September 2025.
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
10,000 reviews
Check prices

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Boarding

7.3

Crew

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

YVR - LAX

Seamless in all ways..arriving 25 minutes early into Los Angeles was outstanding
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Boarding

7.3

Crew

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2024

YVR - LAX

Seamless in all ways..arriving 25 minutes early into Los Angeles was outstanding

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 9h 21m. 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.

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

    Currently, April is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 251). Flying from Saint John to Key Largo in August is currently the most expensive (average of C$ 369). 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 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 579AverageC$ 901FlexibilityNo 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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