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$228+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SOF
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This KLM deal was found by Cheapflights users on 1/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2911:18 am
MIA
-
SOF
2 stops19h 42m
KLM
Wed 5/137:00 am
SOF
-
MIA
2 stops18h 54m
KLM
Deal found 1/28$540
This Mytrip deal was found by Cheapflights users on 1/27. 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 4/2812:25 pm
MIA
-
SOF
2 stops16h 45m
Multiple Airlines
Tue 5/126:10 am
SOF
-
MIA
1 stop15h 30m
Multiple Airlines
Deal found 1/27$551
This Mytrip deal was found by Cheapflights users on 1/28. 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.
Wed 4/2912:25 pm
MIA
-
SOF
2 stops18h 00m
Multiple Airlines
Wed 5/136:20 am
SOF
-
MIA
1 stop15h 20m
Multiple Airlines
Deal found 1/28$553
This CrystalTravel deal was found by Cheapflights users on 1/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:30 pm
MIA
-
SOF
1 stop15h 20m
Turkish Airlines
Thu 3/54:00 pm
SOF
-
MIA
1 stop22h 00m
Turkish Airlines
Deal found 1/28$574
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/284:00 pm
MIA
-
SOF
2 stops45h 05m
Multiple Airlines
Sat 3/147:15 pm
SOF
-
MIA
1 stop31h 45m
Multiple Airlines
Deal found 1/27$589
This Justfly.com deal was found by Cheapflights users on 1/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1810:20 am
MIA
-
SOF
1 stop15h 25m
Turkish Airlines
Wed 3/49:35 am
SOF
-
MIA
1 stop18h 00m
Turkish Airlines
Deal found 1/27$591
This Justfly.com deal was found by Cheapflights users on 1/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:30 pm
MIA
-
SOF
1 stop14h 45m
Turkish Airlines
Wed 5/139:05 pm
SOF
-
MIA
1 stop17h 05m
Turkish Airlines
Deal found 1/28$592
This Justfly.com deal was found by Cheapflights users on 1/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/610:20 am
MIA
-
SOF
1 stop15h 25m
Turkish Airlines
Thu 2/199:35 am
SOF
-
MIA
1 stop28h 25m
Turkish Airlines
Deal found 1/28$596
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:30 pm
MIA
-
SOF
1 stop31h 45m
Turkish Airlines
Wed 6/103:50 pm
SOF
-
MIA
1 stop35h 45m
Turkish Airlines
Deal found 1/27$601

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$536
(KLM)

One-way from

$228
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$636
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 ($267 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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 4/29

11:18 am-2:00 pm

2 stops19h 42m

Sofia

Wed 5/13

7:00 am-6:54 pm

2 stops18h 54m

$540

MiamiSofia

MIA - SOF

MIASOF

Miami

Sun 3/1

10:20 am-3:10 pm

1 stop21h 50m

Sofia

Sun 3/15

9:35 am-9:35 pm

1 stop18h 00m

$574

MiamiSofia

MIA - SOF

MIASOF

Miami

Mon 5/4

10:50 am-11:10 pm

2 stops29h 20m

Sofia

Thu 6/11

6:30 am-2:40 pm

1 stop15h 10m

$615

MiamiSofia

MIA - SOF

MIASOF

Miami

Mon 5/4

6:15 am-11:10 pm

2 stops33h 55m

Sofia

Tue 6/9

6:10 am-2:40 pm

1 stop15h 30m

$615

MiamiSofia

MIA - SOF

MIASOF

Miami

Mon 5/4

6:15 am-11:10 pm

2 stops33h 55m

Sofia

Fri 6/12

6:20 am-2:40 pm

1 stop15h 20m

$615

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 5/6

12:10 pm-11:10 pm

2 stops28h 00m

Sofia

Tue 6/2

6:10 am-2:40 pm

1 stop15h 30m

$615

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 5/6

12:10 pm-6:40 pm

2 stops23h 30m

Sofia

Fri 6/5

6:20 am-2:40 pm

1 stop15h 20m

$615

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 5/6

12:10 pm-11:10 pm

2 stops28h 00m

Sofia

Thu 6/4

6:30 am-6:35 pm

2 stops19h 05m

$625

MiamiSofia

MIA - SOF

MIASOF

Miami

Wed 5/6

8:15 am-10:40 am

2 stops19h 25m

Sofia

Thu 6/11

6:30 am-5:07 pm

2 stops17h 37m

$630

MiamiSofia

MIA - SOF

MIASOF

Miami

Tue 5/5

9:45 pm-10:40 am

2 stops29h 55m

Sofia

Thu 6/11

6:30 am-10:17 pm

2 stops22h 47m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 15 results
1
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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 January 23, 2026.

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 $839). 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 Key Largo to Sofia?

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 January 29, 2026.
Read reviews from past customers who have flown SWISS, United Airlines, and Turkish 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.
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.
SWISS
7.6
Good
1,864 reviews
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.
United Airlines
7.4
Good
9,215 reviews
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.
Turkish Airlines
7.3
Good
4,208 reviews
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.
Lufthansa
6.8
Okay
7,756 reviews
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.
British Airways
6.7
Okay
7,705 reviews
SWISS
7.6
Good
1,864 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Boarding

7.7

Crew

8.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.

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. 5 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 $540, KLM can have you in Sofia from Key Largo in 19h 42m. 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 United Airlines, which is currently one of the cheapest options available, starting at $385. Turkish Airlines flights start at $403 while deals on Lufthansa start at $410 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 $839). 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 5 airlines flying from Key Largo to Sofia

Discover the top 5 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$595Average$918FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$630Average$863FlexibilityNo cancel feeOn-time70%
SWISSCheapest$632Average$1,089FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$651Average$1,094FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$657Average$1,025FlexibilityNo cancel feeOn-time69%

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