Find flights
When to book
Airlines
FAQs

Cheap flights from Saint John to Key Largo from C$ 579

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
12 Dec — 19 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 12 November 2025.

Tue 30/124:15 p.m.YSJ - MIA
1 stop21h 19mAir Canada
Mon 5/19:05 p.m.MIA - YSJ
1 stop12h 34mAir Canada
Deal found 10/11C$ 951
Tue 30/1211:30 a.m.YSJ - MIA
2 stops24h 00mMultiple Airlines
Mon 5/19:05 p.m.MIA - YSJ
1 stop12h 34mMultiple Airlines
Deal found 10/11C$ 952
Thu 13/114:15 p.m.YSJ - MIA
2 stops19h 38mMultiple Airlines
Wed 19/118:00 a.m.MIA - YSJ
1 stop6h 33mMultiple Airlines
Deal found 10/11C$ 1,423
Thu 13/114:15 p.m.YSJ - MIA
1 stop7h 14mAir Canada
Wed 19/118:00 a.m.MIA - YSJ
1 stop6h 33mAir Canada
Deal found 10/11C$ 1,437
Sat 15/114:15 p.m.YSJ - MIA
2 stops19h 59mMultiple Airlines
Sat 22/118:00 a.m.MIA - YSJ
1 stop6h 33mMultiple Airlines
Deal found 10/11C$ 1,450
Sat 15/114:15 p.m.YSJ - MIA
1 stop7h 14mAir Canada
Sat 22/118:00 a.m.MIA - YSJ
1 stop6h 33mAir Canada
Deal found 10/11C$ 1,467
Sat 15/114:15 p.m.YSJ - MIA
3 stops23h 22mUnited Airlines
Sat 22/111:19 p.m.MIA - YSJ
2 stops20h 40mUnited Airlines
Deal found 10/11C$ 1,725

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 12 November 2025.

Round-trip from

C$ 579

Popular in

December

Cheapest in

July

Average price

C$ 693
Air Canada
  • Air Canada
  • 24/3-25/3
  • 2 total stops
  • 13h 49m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 179 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 12 November 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

Tue 24/3

4:15 p.m.-10:29 p.m.

1 stop7h 14m

Miami

Wed 25/3

8:00 a.m.-3:35 p.m.

1 stop6h 35m

C$ 579

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sun 15/3

4:15 p.m.-10:29 p.m.

1 stop7h 14m

Miami

Sat 21/3

8:00 a.m.-3:35 p.m.

1 stop6h 35m

C$ 616

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 14/3

4:15 p.m.-10:29 p.m.

1 stop7h 14m

Miami

Sat 21/3

8:00 a.m.-3:35 p.m.

1 stop6h 35m

C$ 652

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 10/4

5:40 a.m.-10:16 p.m.

2 stops17h 36m

Miami

Sat 18/4

9:00 a.m.-11:29 p.m.

2 stops13h 29m

C$ 788

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Tue 24/3

5:40 a.m.-10:39 p.m.

2 stops17h 59m

Miami

Wed 25/3

9:00 a.m.-11:29 p.m.

2 stops13h 29m

C$ 788

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 26/12

5:40 a.m.-10:54 a.m.

2 stops30h 14m

C$ 890

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 26/12

12:00 p.m.-5:54 p.m.

3 stops30h 54m

C$ 932

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 27/12

4:15 p.m.-12:34 p.m.

1 stop21h 19m

C$ 951

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 27/12

5:40 a.m.-1:08 a.m.

2 stops20h 28m

C$ 979

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 26/12

11:30 a.m.-12:16 a.m.

1 stop13h 46m

C$ 1,032

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/11

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, September is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 248). Flying from Saint John to Key Largo in February is currently the most expensive (average of C$ 537). 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 12 November 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
10,444 reviews
Check prices

Boarding

7.3

Crew

7.8

Comfort

7.1

Entertainment

6.8

Food

6.3

Overall

7.1

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
10,444 reviews
Air Canada
7.1
Good
10,444 reviews
Check prices

Boarding

7.3

Crew

7.8

Comfort

7.1

Entertainment

6.8

Food

6.3

Overall

7.1

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 7h 14m. 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, September is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 248). Flying from Saint John to Key Largo in February is currently the most expensive (average of C$ 537). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 12 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 586AverageC$ 918FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Key Largo from St John today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from St John to Key Largo?

Millions of users choose and trust Cheapflights to book the best flight deals from St John to Key Largo for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.