Find flights
When to book
Airlines
FAQs

Cheap flights from Saint John to Key Largo from C$ 344

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 21/2. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — MIA
6 Feb — 13 Feb1
1 adult
1 adult, Economy, 0 bags

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 7 January 2026.

Round-trip from

C$ 538

One-way from

C$ 344

Popular in

December

Cheapest in

July

Average price

C$ 663
Air Canada
  • Air Canada
  • 11/2-18/2
  • 2 total stops
  • 13h 54m total
  • Saint John to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 21/2
  • 1 total stop
  • 7h 14m total
  • Saint John to Key Largo
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 7 January 2026.

Wed 11/24:15 p.m.YSJ - MIA
1 stop7h 14mAir Canada
Wed 18/28:00 a.m.MIA - YSJ
1 stop6h 40mAir Canada
Deal found 7/1C$ 538
Tue 22/95:55 a.m.YSJ - MIA
1 stop6h 36mAir Canada
Thu 24/912:30 p.m.MIA - YSJ
1 stop10h 20mAir Canada
Deal found 6/1C$ 601
Wed 14/14:15 p.m.YSJ - MIA
1 stop7h 14mAir Canada
Wed 21/19:05 p.m.MIA - YSJ
1 stop12h 34mAir Canada
Deal found 7/1C$ 680
Fri 10/45:35 a.m.YSJ - MIA
2 stops18h 10mUnited Airlines
Sat 18/48:55 a.m.MIA - YSJ
2 stops13h 57mUnited Airlines
Deal found 7/1C$ 733
Fri 10/45:35 a.m.YSJ - MIA
1 stop6h 43mAir Canada
Sat 18/48:55 a.m.MIA - YSJ
2 stops13h 57mAir Canada
Deal found 6/1C$ 762
Wed 11/25:40 a.m.YSJ - MIA
2 stops11h 00mUnited Airlines
Wed 18/29:00 a.m.MIA - YSJ
2 stops24h 49mUnited Airlines
Deal found 7/1C$ 784
Wed 14/15:40 a.m.YSJ - MIA
2 stops12h 35mUnited Airlines
Wed 21/112:35 p.m.MIA - YSJ
2 stops21h 04mUnited Airlines
Deal found 7/1C$ 799

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 7 January 2026.
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

Wed 11/2

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

1 stop7h 14m

Miami

Wed 18/2

8:00 a.m.-3:40 p.m.

1 stop6h 40m

C$ 538

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 10/4

5:35 a.m.-10:45 p.m.

2 stops18h 10m

Miami

Sat 18/4

8:55 a.m.-11:52 p.m.

2 stops13h 57m

C$ 733

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Fri 10/4

5:35 a.m.-11:18 a.m.

1 stop6h 43m

Miami

Sat 18/4

8:55 a.m.-11:52 p.m.

2 stops13h 57m

C$ 762

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Wed 11/2

5:40 a.m.-3:40 p.m.

2 stops11h 00m

Miami

Wed 18/2

9:00 a.m.-10:49 a.m.

2 stops24h 49m

C$ 784

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Mon 2/3

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

2 stops26h 09m

Miami

Tue 10/3

2:10 p.m.-3:45 p.m.

2 stops24h 35m

C$ 882

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 21/2

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

1 stop7h 14m

C$ 344

Saint JohnMiami

YSJ - MIA

YSJMIA

Saint John

Sat 21/2

4:15 p.m.-10:55 a.m.

2 stops19h 40m

C$ 357

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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$ 245). Flying from Saint John to Key Largo in February is currently the most expensive (average of C$ 499). 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 7 January 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
10,604 reviews
Check prices

Crew

7.8

Food

6.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,604 reviews
Air Canada
7.1
Good
10,604 reviews
Check prices

Crew

7.8

Food

6.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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 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, September is the cheapest month in which you can book a flight from Saint John to Key Largo (average of C$ 245). Flying from Saint John to Key Largo in February is currently the most expensive (average of C$ 499). 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 7 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 570AverageC$ 887FlexibilityNo 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.