Heidelberg

$225+ Cheap flights from Key Largo, FL to Heidelberg, Germany

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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — FRA
mars 2 — mars 91
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Cheapflights Tip: The best prices from Key Largo to Heidelberg are usually found in January or February, booked 89 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Key Largo to Heidelberg

Cheapest flights from Key Largo to Heidelberg
Explore the most affordable flight options available from Key Largo to Heidelberg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 31, 2026.

This AirNGo deal was found by Cheapflights users on 1/29. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 2/111:50 pm
MIA
-
FRA
1 stop16h 50m
TAP AIR PORTUGAL
mar. 2/175:45 pm
FRA
-
MIA
1 stop27h 05m
TAP AIR PORTUGAL
Deal found 1/29$532
This Billigflug deal was found by Cheapflights users on 1/31. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 3/44:35 pm
MIA
-
FRA
1 stop13h 55m
TAP AIR PORTUGAL
sam. 3/145:45 pm
FRA
-
MIA
1 stop27h 05m
TAP AIR PORTUGAL
Deal found 1/31$540
This oojo deal was found by Cheapflights users on 1/31. 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.
mer. 3/411:35 pm
MIA
-
FRA
1 stop17h 05m
TAP AIR PORTUGAL
jeu. 3/125:45 pm
FRA
-
MIA
1 stop27h 05m
TAP AIR PORTUGAL
Deal found 1/31$543
This oojo deal was found by Cheapflights users on 1/30. 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.
mer. 4/293:50 am
MIA
-
FRA
1 stop32h 50m
TAP AIR PORTUGAL
lun. 5/117:40 pm
FRA
-
MIA
1 stop24h 50m
TAP AIR PORTUGAL
Deal found 1/30$547
This deal was found by Cheapflights users on 1/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 4/226:15 pm
MIA
-
FRA
1 stop16h 05m
Icelandair
mar. 4/282:00 pm
FRA
-
MIA
1 stop13h 55m
Icelandair
Deal found 1/30$551
This oojo deal was found by Cheapflights users on 1/29. 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.
lun. 2/94:35 pm
MIA
-
FRA
1 stop13h 55m
TAP AIR PORTUGAL
mer. 3/46:00 am
FRA
-
MIA
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 1/29$559
This FlightHub deal was found by Cheapflights users on 1/30. 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.
dim. 2/811:50 pm
MIA
-
FRA
1 stop16h 50m
TAP AIR PORTUGAL
mar. 3/36:00 am
FRA
-
MIA
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 1/30$560
This oojo deal was found by Cheapflights users on 1/29. 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.
jeu. 2/194:35 pm
MIA
-
FRA
1 stop13h 55m
TAP AIR PORTUGAL
lun. 3/25:45 pm
FRA
-
MIA
1 stop27h 05m
TAP AIR PORTUGAL
Deal found 1/29$579
This Gurufare deal was found by Cheapflights users on 1/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 2/115:15 pm
MIA
-
FRA
1 stop12h 50m
Icelandair
jeu. 3/51:05 pm
FRA
-
MIA
1 stop13h 50m
Icelandair
Deal found 1/30$582
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/238:40 pm
MIA
-
FRA
1 stop11h 50m
Scandinavian Airlines
mar. 3/103:15 pm
FRA
-
MIA
1 stop33h 20m
Scandinavian Airlines
Deal found 1/28$587
This AirNGo deal was found by Cheapflights users on 1/29. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/96:00 am
MIA
-
FRA
1 stop21h 40m
Virgin Atlantic
mar. 3/249:50 am
FRA
-
MIA
1 stop20h 02m
Virgin Atlantic
Deal found 1/29$593

Find flight deals from Key Largo to Heidelberg

Keep the following information in mind while searching for Key Largo to Heidelberg flight deals. Data was last updated janvier 31, 2026.

Round-trip from

$540
(Billigflug)

One-way from

$225
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$589
From Key Largo to Heidelberg
One-way flight from Key Largo to Heidelberg
Highest demand for flights based on searches. 6% potential increase in price ($54 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Average for round-trip flights in January 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Heidelberg 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 janvier 31, 2026.
Use the filters below to find and compare flights from Key Largo to Heidelberg that are best for you.

Fly from

Key Largo

Fly to

Heidelberg

Route

Depart

Return

Price

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

lun. 2/23

8:40 pm-9:50 am

1 stop31h 10m

Frankfurt am Main

ven. 2/27

3:15 pm-6:35 pm

1 stop33h 20m

$594

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

lun. 3/9

3:33 pm-8:40 am

1 stop12h 07m

Frankfurt am Main

mar. 3/24

6:55 am-6:54 pm

2 stops16h 59m

$644

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

dim. 2/15

6:00 am-8:40 am

1 stop20h 40m

Frankfurt am Main

jeu. 2/26

6:55 am-6:21 pm

2 stops17h 26m

$652

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

mer. 3/4

8:05 am-7:50 am

1 stop17h 45m

Frankfurt am Main

ven. 3/13

10:15 am-11:24 pm

2 stops18h 09m

$652

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

mar. 3/3

11:34 am-8:55 am

2 stops15h 21m

Frankfurt am Main

jeu. 3/12

6:55 am-6:54 pm

2 stops16h 59m

$655

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

mar. 3/3

6:00 am-7:50 am

2 stops19h 50m

Frankfurt am Main

mar. 3/17

10:40 am-12:52 am

2 stops19h 12m

$657

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

lun. 2/23

4:46 pm-1:40 pm

2 stops14h 54m

Frankfurt am Main

mar. 3/10

6:55 am-6:54 pm

2 stops16h 59m

$661

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

lun. 4/27

11:08 am-10:15 am

3 stops41h 07m

$312

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

sam. 5/2

8:00 am-7:25 am

2 stops41h 25m

$314

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

jeu. 5/14

9:35 pm-6:15 pm

1 stop14h 40m

$316

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 18 results
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Best time to book a flight from Key Largo to Heidelberg

Have a flexible travel schedule? Discover the best time to fly to Heidelberg 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 Heidelberg

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Heidelberg. Price data was last updated on January 30, 2026.

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to Heidelberg. 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 Key Largo to Heidelberg?

Currently, May is the cheapest month in which you can book a flight from Key Largo to Heidelberg (average of $404). Flying from Key Largo to Heidelberg in August is currently the most expensive (average of $677). 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 HE1?

Find hourly flight availability from Key Largo to Heidelberg. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated janvier 31, 2026.

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

Weekly flight availability from Key Largo to Heidelberg

Explore weekly flight availability from Key Largo to Heidelberg. 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 janvier 31, 2026.

The most flights from KE9 to HE1 are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Key Largo to Heidelberg?

Reviews of airlines servicing Heidelberg

Get insights into the airlines that provide service to Heidelberg. 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 Heidelberg. Reviews last updated janvier 31, 2026.
Peruse reviews from past customers who have flown with United Airlines, TAP AIR PORTUGAL, and Air Europa from Key Largo to Heidelberg to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Heidelberg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Key Largo to Heidelberg?

    A quick flight from Key Largo to Heidelberg can take about 12h 07m. Scandinavian Airlines provides one of the quickest options available for as low as $644. There are 4820 mi between Key Largo and Heidelberg. This flight may include one or multiple stops.

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

    For one-way options, check prices for Condor. According to our data, you can fly for as low as $265. Users have also found prices from $334 and $336 on Air Europa and TAP AIR PORTUGAL, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Key Largo to Heidelberg on time: Austrian Airlines (55%), United Airlines (55%), Lufthansa (55%).

  • What are the cheapest flights from Key Largo to Heidelberg?

    On average you can expect to pay $1,397 for a flight from Key Largo to Heidelberg. The cheapest flight overall is $309 while the most popular route, (Miami - Frankfurt am Main) is currently priced at $421.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Key Largo to Heidelberg (average of $404). Flying from Key Largo to Heidelberg in August is currently the most expensive (average of $677). 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 10 airlines flying from Key Largo to Heidelberg

Discover the top 10 airlines that operate flights from Key Largo to Heidelberg. 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 janvier 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$403Average$767FlexibilityNo cancel feeOn-timeN/A
CondorCheapest$500Average$781FlexibilityNo cancel feeOn-time76%
DeltaCheapest$536Average$885FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$548Average$636FlexibilityNo cancel feeOn-time77%
Air EuropaCheapest$551Average$717FlexibilityNo cancel feeOn-time83%
IberiaCheapest$614Average$712FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$627Average$1,013FlexibilityNo cancel feeOn-time76%
SWISSCheapest$629Average$1,046FlexibilityNo cancel feeOn-time79%
Turkish AirlinesCheapest$676Average$903FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$682Average$899FlexibilityNo cancel feeOn-time70%

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