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Heidelberg

$345+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — FRA
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Heidelberg are usually found in January or February, booked 35 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 December 16, 2025.

This KAYAK deal was found by Cheapflights users on 12/13. 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 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Tue 1/138:30 pmFRA - MIA
1 stop28h 05mScandinavian Airlines
Deal found 12/13$698
This Scandinavian 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Wed 1/148:30 pmFRA - MIA
2 stops28h 05mScandinavian Airlines
Deal found 12/14$706
This KAYAK deal was found by Cheapflights users on 12/13. 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 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Mon 1/1210:30 amFRA - MIA
2 stops18h 50mScandinavian Airlines
Deal found 12/13$718
This Scandinavian 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Thu 1/153:15 pmFRA - MIA
2 stops55h 15mScandinavian Airlines
Deal found 12/14$734
This Scandinavian 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Sun 1/1110:30 amFRA - MIA
2 stops36h 00mScandinavian Airlines
Deal found 12/14$765
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:00 pmMIA - FRA
1 stop15h 10mITA Airways
Wed 1/76:00 pmFRA - MIA
1 stop32h 55mITA Airways
Deal found 12/15$780
This Royal Air Maroc 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 Royal Air Maroc is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/289:20 pmMIA - FRA
1 stop13h 15mRoyal Air Maroc
Thu 1/155:35 pmFRA - MIA
1 stop31h 45mRoyal Air Maroc
Deal found 12/14$796
This KAYAK deal was found by Cheapflights users on 12/13. 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 12/247:55 pmMIA - FRA
2 stops36h 35mScandinavian Airlines
Fri 1/98:30 pmFRA - MIA
2 stops51h 35mScandinavian Airlines
Deal found 12/13$806
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:00 pmMIA - FRA
1 stop15h 10mITA Airways
Tue 1/66:00 pmFRA - MIA
1 stop28h 55mITA Airways
Deal found 12/14$813
This Royal Air Maroc 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 Royal Air Maroc is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/289:20 pmMIA - FRA
1 stop13h 15mRoyal Air Maroc
Tue 1/135:35 pmFRA - MIA
1 stop31h 45mRoyal Air Maroc
Deal found 12/14$816

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 December 16, 2025.

Round-trip from

$666
(KAYAK)

One-way from

$345
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$950
From Key Largo to Heidelberg
Search Deals
One-way flight from Key Largo to Heidelberg
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 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 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 December 16, 2025.
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

Fri 1/23

9:45 pm-5:50 pm

1 stop14h 05m

Frankfurt am Main

Wed 2/11

10:45 am-7:30 pm

1 stop14h 45m

$709

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Fri 2/6

9:45 pm-5:50 pm

1 stop14h 05m

Frankfurt am Main

Sat 2/14

7:05 pm-7:30 pm

1 stop30h 25m

$720

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Sat 1/24

8:40 pm-9:50 am

2 stops31h 10m

Frankfurt am Main

Tue 1/27

10:30 am-2:29 pm

2 stops33h 59m

$734

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Wed 2/4

9:45 pm-5:50 pm

1 stop14h 05m

Frankfurt am Main

Fri 2/13

10:45 am-7:30 pm

1 stop14h 45m

$734

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Mon 1/12

7:40 am-9:50 am

2 stops20h 10m

Frankfurt am Main

Thu 1/29

3:15 pm-11:20 pm

2 stops38h 05m

$736

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Thu 3/5

11:34 am-2:30 pm

2 stops20h 56m

Frankfurt am Main

Mon 3/16

10:00 pm-11:24 pm

2 stops30h 24m

$746

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Tue 3/10

11:23 am-2:30 pm

2 stops22h 07m

Frankfurt am Main

Tue 4/7

10:00 pm-11:38 pm

2 stops31h 38m

$746

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Fri 2/6

7:40 am-9:50 am

2 stops20h 10m

Frankfurt am Main

Mon 2/16

10:00 pm-11:51 pm

2 stops31h 51m

$746

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Sun 2/15

8:40 pm-7:45 pm

1 stop17h 05m

Frankfurt am Main

Thu 2/26

9:45 pm-6:35 pm

2 stops26h 50m

$755

MiamiFrankfurt am Main

MIA - FRA

MIAFRA

Miami

Fri 2/6

9:45 pm-5:50 pm

1 stop14h 05m

Frankfurt am Main

Fri 2/13

10:45 am-7:30 pm

1 stop14h 45m

$759

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 23 results
1
2
3

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 December 12, 2025.

Booking 35 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 $394). 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 December 16, 2025.

When flying from Key Largo to Heidelberg, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 22% versus a flight in the afternoon.

What is the cheapest day to fly from Key Largo to Heidelberg?

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

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

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 December 16, 2025.

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).

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 December 16, 2025.
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.
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
TAP AIR PORTUGAL
7.2
Good
2,089 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Air Europa
7.0
Good
571 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,630 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Condor
6.4
Okay
390 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 11h 50m. Scandinavian Airlines provides one of the quickest options available for as low as $699. 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 $264. 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: Thai Airways (88%), Condor (75%), Alaska Airlines (75%).

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

    On average you can expect to pay $1,541 for a flight from Key Largo to Heidelberg. The cheapest flight overall is $366 while the most popular route, (Miami - Frankfurt am Main) is currently priced at $511.

  • 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 $394). 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.

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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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$433Average$748FlexibilityNo cancel feeOn-timeN/A
CondorCheapest$515Average$778FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$532Average$621FlexibilityNo cancel feeOn-time77%
DeltaCheapest$536Average$885FlexibilityNo cancel feeOn-timeN/A
Air EuropaCheapest$551Average$714FlexibilityNo cancel feeOn-time83%
IberiaCheapest$614Average$712FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$627Average$1,021FlexibilityNo cancel feeOn-time76%
SWISSCheapest$629Average$1,047FlexibilityNo cancel feeOn-time79%
Turkish AirlinesCheapest$676Average$885FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$682Average$899FlexibilityNo cancel feeOn-time70%

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