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Key Largo

$133+ Cheap flights from San Diego (SAN) to Key Largo, FL

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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — MIA
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to Key Largo are usually found in September or August, booked 50 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from San Diego to Key Largo

Keep the following information in mind while searching for San Diego to Key Largo flight deals. Data was last updated March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$271
(Mytrip)

One-way from

$135
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$487
Provider with most accurate pricing for San Diego-Miami flight deals.
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Provider most trusted by Cheapflights users for San Diego-Miami flights.
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From San Diego to Key Largo
Search Deals
One-way flight from San Diego to Key Largo
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from San Diego to Key Largo

Cheapest flights from San Diego to Key Largo
Explore the most affordable flight options available from San Diego to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

This Mytrip deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:15 amSAN - MIA
1 stop21h 00mSpirit Airlines
Tue 4/158:58 amMIA - SAN
3 stops42h 44mSpirit Airlines
Deal found 3/22$271
This CheapOair deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1112:19 pmSAN - MIA
1 stop14h 02mMultiple Airlines
Wed 4/167:22 amMIA - SAN
1 stop15h 32mMultiple Airlines
Deal found 3/24$272
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:55 pmSAN - MIA
Nonstop4h 49mAmerican Airlines
Tue 4/158:27 amMIA - SAN
Nonstop5h 31mAmerican Airlines
Deal found 3/22$276
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:15 amSAN - MIA
1 stop8h 40mDelta
Wed 5/212:26 pmMIA - SAN
1 stop8h 42mDelta
Deal found 3/24$277
This Frontier deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/412:19 pmSAN - MIA
1 stop14h 02mFrontier
Tue 5/66:00 amMIA - SAN
1 stop9h 17mFrontier
Deal found 3/24$298
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:15 amSAN - MIA
2 stops10h 44mUnited Airlines
Wed 4/28:50 amMIA - SAN
1 stop8h 00mUnited Airlines
Deal found 3/24$336
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/246:35 amSAN - MIA
1 stop9h 00mSouthwest
Wed 3/263:00 pmMIA - SAN
2 stops10h 40mSouthwest
Deal found 3/23$340

Cheapflights Fare Finder

Customize your flight search to find flights from San Diego 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 2,558,603 searches. Data last updated March 25, 2025.
Use the filters below to find and compare flights from San Diego to Key Largo that are best for you.

Fly from

San Diego

Fly to

Key Largo

Route

Depart

Return

Price

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/1

6:15 am-6:15 am

1 stop21h 00m

Miami

Tue 4/15

8:58 am-12:42 am

3 stops42h 44m

$271

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Fri 4/11

12:19 pm-5:21 am

1 stop14h 02m

Miami

Wed 4/16

7:22 am-7:54 pm

1 stop15h 32m

$272

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/1

9:55 pm-5:44 am

Nonstop4h 49m

Miami

Tue 4/15

8:27 am-10:58 am

Nonstop5h 31m

$276

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Thu 5/15

6:15 am-5:55 pm

1 stop8h 40m

Miami

Wed 5/21

2:26 pm-8:08 pm

1 stop8h 42m

$277

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Fri 4/4

12:19 pm-5:21 am

1 stop14h 02m

Miami

Wed 5/7

6:00 am-12:17 pm

1 stop9h 17m

$298

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/1

6:15 am-7:59 pm

2 stops10h 44m

Miami

Wed 4/2

8:50 am-1:50 pm

1 stop8h 00m

$336

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/8

8:40 am-8:55 pm

2 stops9h 15m

Miami

Wed 4/9

7:00 am-4:25 pm

2 stops12h 25m

$345

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Thu 4/17

9:08 pm-1:33 pm

2 stops13h 25m

$133

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/1

4:21 pm-5:21 am

1 stop10h 00m

$149

San DiegoMiami

SAN - MIA

SANMIA

San Diego

Tue 4/1

9:55 pm-5:44 am

Nonstop4h 49m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 16 results
1
2

Best time to book a flight from San Diego to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from San Diego 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 San Diego to Key Largo

How far ahead should I book a flight from San Diego to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Key Largo. Price data was last updated on March 21, 2025.

Booking 50 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Diego to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Diego to Key Largo?

Currently, September is the cheapest month in which you can book a flight from San Diego to Key Largo (average of $229). Flying from San Diego to Key Largo in March is currently the most expensive (average of $289). 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.

What is the cheapest time of day to fly from SAN to KE9?

Find hourly flight availability from San Diego to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Diego to Key Largo as you normally would.

What is the cheapest day to fly from San Diego to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Key Largo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to Key Largo flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Diego to Key Largo

Explore weekly flight availability from San Diego to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 25, 2025.

The most flights from SAN to KE9 are scheduled on a Thursday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

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 March 25, 2025.
To help decide which airline to fly from San Diego to Key Largo, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,782 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from San Diego 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 San Diego to Key Largo?

    San Diego (SAN), located 2.6 mi from the city center, is the airport you fly out of when you book flights from San Diego to Key Largo. 9 airlines have flights from San Diego to Key Largo on a regular basis. Booking flights from San Diego to Key Largo should not be difficult; the airport handles an average of 6 outbound flights to Key Largo per day.

  • How popular is this San Diego to Key Largo flight route?

    The San Diego to Key Largo flight path was viewed by 11 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from San Diego to Key Largo one-way?

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $135. Frontier flights start at $139 while deals on Delta start at $149 one-way.

  • What are the most reliable airlines from San Diego to Key Largo?

    Before booking your flight to Key Largo from San Diego, check out the most reliable airlines to get you to your destination on time: American Airlines (90%), Alaska Airlines (90%), Qatar Airways( 89%).

  • What are the cheapest flights from San Diego to Key Largo?

    The cheapest flight price from San Diego to Key Largo is $170. On average you can expect to pay $1,142. The most popular route, (San Diego - Miami), can usually be booked for $191.

  • Can I find deals for flights from San Diego to Key Largo that include hotel bookings?

    Yes. In addition to deals on San Diego to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Key Largo.

  • Can I find deals for business class flights from San Diego to Key Largo?

    Yes. Cheapflights offers flight deals from San Diego 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 San Diego to Key Largo?

    Currently, September is the cheapest month in which you can book a flight from San Diego to Key Largo (average of $229). Flying from San Diego to Key Largo in March is currently the most expensive (average of $289). 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.

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Top 9 airlines flying from San Diego to Key Largo

Discover the top 9 airlines that operate flights from San Diego 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 2,558,603 searches. Data last updated March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$98Average$347FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$106Average$210FlexibilityNo cancel feeOn-time65%
FrontierCheapest$130Average$225FlexibilityNo cancel feeOn-time62%
DeltaCheapest$174Average$391FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$196Average$518FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$200Average$461FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$237Average$414FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$277Average$388FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$291Average$561FlexibilityNo cancel feeOn-time63%
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