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$368+ Cheap flights from Key Largo, FL to Sofia (SOF)

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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SOF
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Sofia are usually found in September or February, booked 46 days in advance, depart on a Wednesday or Sunday and return on a Wednesday

Cheap flight deals from Key Largo to Sofia

Cheapest flights from Key Largo to Sofia
Explore the most affordable flight options available from Key Largo to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:35 pmMIA - SOF
1 stop35h 15mLOT
Tue 1/62:35 pmSOF - MIA
1 stop34h 00mLOT
Deal found 12/15$1,169
This Mytrip deal was found by Cheapflights users on 12/15. 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 12/306:45 pmMIA - SOF
2 stops14h 55mMultiple Airlines
Tue 1/63:00 pmSOF - MIA
2 stops33h 35mMultiple Airlines
Deal found 12/15$1,171
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Mon 12/156:45 pmMIA - SOF
1 stop21h 00mUnited Airlines
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mUnited Airlines
Deal found 12/14$1,259
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/141:25 pmMIA - SOF
2 stops26h 20mUnited Airlines
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mUnited Airlines
Deal found 12/14$1,263
This KAYAK deal was found by Cheapflights users on 12/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:45 pmMIA - SOF
1 stop16h 35mLufthansa
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mLufthansa
Deal found 12/14$1,264
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/167:50 pmMIA - SOF
2 stops39h 30mUnited Airlines
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mUnited Airlines
Deal found 12/14$1,284
This KAYAK deal was found by Cheapflights users on 12/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:45 pmMIA - SOF
2 stops21h 00mLufthansa
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mLufthansa
Deal found 12/14$1,296
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/174:40 pmMIA - SOF
2 stops23h 05mUnited Airlines
Wed 12/242:00 pmSOF - MIA
1 stop33h 55mUnited Airlines
Deal found 12/14$1,318
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:50 pmMIA - SOF
1 stop12h 25mSWISS
Wed 1/72:00 pmSOF - MIA
2 stops55h 40mSWISS
Deal found 12/15$1,320
This KAYAK deal was found by Cheapflights users on 12/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/164:40 pmMIA - SOF
2 stops23h 05mLufthansa
Wed 12/242:25 pmSOF - MIA
2 stops33h 30mLufthansa
Deal found 12/14$1,331

Find flight deals from Key Largo to Sofia

Keep the following information in mind while searching for Key Largo to Sofia flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$587
(FlightHub)

One-way from

$368
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,141
Provider with most accurate pricing for Miami-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Sofia flights.
Search Deals
From Key Largo to Sofia
Search Deals
One-way flight from Key Largo to Sofia
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($269 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Sofia 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 December 15, 2025.
Use the filters below to find and compare flights from Key Largo to Sofia that are best for you.

Fly from

Key Largo

Fly to

Sofia

Route

Depart

Return

Price

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 1/21

10:30 pm-3:10 pm

1 stop33h 40m

Sofia

Wed 2/18

4:00 pm-8:35 pm

1 stop35h 35m

$587

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 2/3

10:30 pm-8:50 pm

1 stop15h 20m

Sofia

Tue 2/10

9:40 pm-7:00 am

1 stop16h 20m

$623

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 2/3

6:45 pm-6:20 pm

1 stop16h 35m

Sofia

Wed 2/11

6:05 am-4:55 pm

1 stop17h 50m

$633

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 2/4

6:45 pm-6:20 pm

1 stop16h 35m

Sofia

Fri 2/13

6:05 am-4:55 pm

1 stop17h 50m

$633

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 2/3

6:45 pm-10:45 pm

1 stop21h 00m

Sofia

Thu 2/12

6:05 am-4:55 pm

1 stop17h 50m

$633

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 2/4

9:45 pm-9:40 pm

1 stop16h 55m

Sofia

Sat 2/14

8:30 pm-8:00 pm

2 stops30h 30m

$637

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 2/3

12:18 pm-1:15 pm

2 stops17h 57m

Sofia

Fri 2/13

6:05 am-4:55 pm

1 stop17h 50m

$637

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 2/4

10:30 pm-8:50 pm

1 stop15h 20m

Sofia

Thu 2/12

4:00 pm-7:00 am

1 stop22h 00m

$640

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 2/3

6:45 pm-6:20 pm

1 stop16h 35m

Sofia

Mon 2/9

1:45 pm-4:55 pm

1 stop34h 10m

$643

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 12/24

4:40 pm-2:00 pm

2 stops38h 20m

$454

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 13 results
1
2

Best time to book a flight from Key Largo to Sofia

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

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Sofia. Price data was last updated on December 12, 2025.

The best time to book flights from Key Largo to Sofia is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Key Largo to Sofia (average of $526). Flying from Key Largo to Sofia in May is currently the most expensive (average of $832). 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 KE9 to SOF?

Find hourly flight availability from Key Largo to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s optimal to fly from Key Largo to Sofia at noon. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated December 15, 2025.
Read reviews from past customers who have flown LOT, SWISS, and United Airlines from Key Largo to Sofia. 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.
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented
LOT
7.6
Good
1,147 reviews
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented
SWISS
7.5
Good
1,812 reviews
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented
United Airlines
7.4
Good
9,092 reviews
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented
Turkish Airlines
7.3
Good
4,097 reviews
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented
Lufthansa
6.8
Okay
7,628 reviews
LOT
7.6
Good
1,147 reviews

Comfort

7.5

Crew

8.2

Boarding

7.6

Food

7.1

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Goh Hua Sheng,Dec 2025

WAW - KRK

even though it was only a one hour flight the cabin crew were polite and detail oriented

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Sofia. 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 into for flights to Sofia from Key Largo?

    For a flight from Key Largo to Sofia, you will be flying into Sofia. Sofia (SOF) is just 4.2 mi from the center of the city. Sofia is the only Sofia airport and it handles 0 inbound flights from Key Largo per day. 6 airlines have flights to Sofia from Key Largo on a regular basis.

  • How long is the flight from Key Largo to Sofia?

    For as low as $633, Turkish Airlines can have you in Sofia from Key Largo in 16h 35m. Key Largo and Sofia are separated by a distance of 5665 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Turkish Airlines, which is currently one of the cheapest options available, starting at $403. Lufthansa flights start at $502 while deals on United Airlines start at $576 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to Sofia 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 Key Largo to Sofia?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Sofia (average of $526). Flying from Key Largo to Sofia in May is currently the most expensive (average of $832). 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 6 airlines flying from Key Largo to Sofia

Discover the top 6 airlines that operate flights from Key Largo to Sofia. 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$597Average$920FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$630Average$799FlexibilityNo cancel feeOn-time70%
SWISSCheapest$653Average$1,195FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$656Average$1,103FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$657Average$1,032FlexibilityNo cancel feeOn-time69%
LOTCheapest$662Average$1,128FlexibilityNo cancel feeOn-time81%

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