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$245+ Cheap flights from Key Largo, FL to Portugal

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Key Largo to Portugal

Keep the following information in mind while searching for Key Largo to Portugal flight deals. Data was last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$555
(Kiwi.com)

One-way from

$245
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$810
Provider with most accurate pricing for Miami-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Miami-Lisbon Humberto Delgado flights.
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From Key Largo to Portugal
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One-way flight from Key Largo to Portugal
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Highest demand for flights based on searches. 20% potential increase in price ($215 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Key Largo to Portugal

Cheapest flights from Key Largo to Portugal
Explore the most affordable flight options available from Key Largo to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:00 pmMIA - OPO
2 stops14h 35mAmerican Airlines
Tue 10/78:15 amOPO - MIA
2 stops18h 35mAmerican Airlines
Deal found 4/15$568
This FlightHub deal was found by Cheapflights users on 4/15. 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.
Sun 9/2812:35 amMIA - OPO
1 stop14h 55mTAP AIR PORTUGAL
Mon 10/69:15 pmOPO - MIA
1 stop22h 30mTAP AIR PORTUGAL
Deal found 4/15$570
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
Sun 5/115:15 pmMIA - FAO
1 stop36h 35mMultiple Airlines
Tue 5/277:00 amFAO - MIA
1 stop36h 20mMultiple Airlines
Deal found 4/17$573
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Wed 5/145:15 pmMIA - OPO
2 stops33h 15mMultiple Airlines
Wed 5/2111:35 amOPO - MIA
1 stop12h 10mMultiple Airlines
Deal found 4/16$578
This United Airlines deal was found by Cheapflights users on 4/16. 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 10/2212:10 pmMIA - OPO
2 stops16h 35mUnited Airlines
Wed 10/2912:35 pmOPO - MIA
1 stop15h 21mUnited Airlines
Deal found 4/16$581
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/304:35 pmMIA - OPO
1 stop17h 55mDelta
Thu 10/94:20 pmOPO - MIA
1 stop26h 55mDelta
Deal found 4/15$584
This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:40 pmMIA - OPO
1 stop14h 55mAir Canada
Wed 10/86:00 amOPO - MIA
2 stops35h 50mAir Canada
Deal found 4/15$585
This Lufthansa deal was found by Cheapflights users on 4/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/284:40 pmMIA - OPO
1 stop13h 35mLufthansa
Thu 10/96:00 amOPO - MIA
1 stop13h 40mLufthansa
Deal found 4/15$624
This oojo deal was found by Cheapflights users on 4/16. 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.
Sun 8/39:30 pmMIA - OPO
1 stop12h 45mAir Europa
Mon 8/1811:35 amOPO - MIA
1 stop12h 10mAir Europa
Deal found 4/16$636
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Mon 5/53:30 pmMIA - FNC
2 stops21h 20mMultiple Airlines
Mon 5/197:00 pmFNC - MIA
2 stops30h 50mMultiple Airlines
Deal found 4/17$659
This Delta deal was found by Cheapflights users on 4/16. 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.
Tue 5/137:15 amMIA - LIS
2 stops20h 35mDelta
Wed 5/219:50 amLIS - MIA
1 stop15h 25mDelta
Deal found 4/16$659
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Tue 5/135:20 pmMIA - LIS
2 stops17h 20mMultiple Airlines
Mon 5/1911:35 amLIS - MIA
1 stop12h 10mMultiple Airlines
Deal found 4/16$660

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo to Portugal 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 April 17, 2025.
Use the filters below to find and compare flights from Key Largo to Portugal that are best for you.

Fly from

Key Largo

Fly to

Portugal

Route

Depart

Return

Price

MiamiFaro

MIA - FAO

MIAFAO

Miami

Sun 5/11

5:15 pm-10:50 am

1 stop36h 35m

Faro

Tue 5/27

7:00 am-2:20 pm

1 stop36h 20m

$573

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 5/14

5:15 pm-7:30 am

2 stops33h 15m

Porto

Wed 5/21

11:35 am-6:45 pm

1 stop12h 10m

$578

MiamiPorto

MIA - OPO

MIAOPO

Miami

Tue 4/29

8:05 am-10:40 am

2 stops21h 35m

Porto

Tue 5/6

4:20 pm-10:06 am

2 stops22h 46m

$598

MiamiPorto

MIA - OPO

MIAOPO

Miami

Thu 5/8

7:55 am-6:30 pm

2 stops29h 35m

Porto

Thu 5/15

6:00 am-11:23 pm

2 stops22h 23m

$637

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 5/13

7:15 am-8:50 am

2 stops20h 35m

Lisbon Humberto Delgado

Tue 5/20

5:40 am-2:15 pm

1 stop13h 35m

$659

MiamiFunchal

MIA - FNC

MIAFNC

Miami

Mon 5/5

3:30 pm-5:50 pm

2 stops21h 20m

Funchal Madeira

Mon 5/19

7:00 pm-8:50 pm

2 stops30h 50m

$659

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 5/13

5:20 pm-3:40 pm

2 stops17h 20m

Lisbon Humberto Delgado

Mon 5/19

11:35 am-6:45 pm

1 stop12h 10m

$660

MiamiLisbon

MIA - LIS

MIALIS

Miami

Thu 4/24

8:50 am-8:20 am

2 stops18h 30m

Lisbon Humberto Delgado

Thu 5/1

12:55 pm-8:34 pm

2 stops36h 39m

$669

MiamiFunchal

MIA - FNC

MIAFNC

Miami

Thu 5/15

9:38 pm-12:20 pm

2 stops57h 42m

Funchal Madeira

Thu 5/22

1:05 pm-2:44 pm

2 stops54h 39m

$675

MiamiLisbon

MIA - LIS

MIALIS

Miami

Fri 4/25

7:25 pm-11:10 pm

2 stops22h 45m

Lisbon Humberto Delgado

Thu 5/1

8:45 pm-3:25 pm

1 stop23h 40m

$683

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 59 results
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Best time to book a flight from Key Largo to Portugal

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

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

Currently, January is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $612). Flying from Key Largo to Portugal in June is currently the most expensive (average of $1,203). 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 PT?

Find hourly flight availability from Key Largo to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

When flying from Key Largo to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Portugal. Price data was last updated on April 28, 2024.

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

Rainfall in Portugal by month

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

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

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

If weather is an important factor for your trip to Portugal, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated April 17, 2025.
To help decide which airline to fly from Key Largo to Portugal, see what other customers have to say about Delta, KLM and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
KLM
7.8
Good
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
SWISS
7.5
Good
1,580 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Key Largo to Portugal flight route?

    Within the past month, 121 users have taken a look at flights from Key Largo to Portugal.

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

    The cheapest airlines for a one-way flight from Key Largo to Portugal are TAP AIR PORTUGAL ($245), Air Canada ($331), and KLM ($345).

  • What are the most popular routes from Key Largo to Portugal?

    Most travelers choose Miami - Lisbon Humberto Delgado, Miami - Porto or Miami - Ponta Delgada Nordela when deciding on the best route from Key Largo to Portugal.

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

    Before booking your flight to Portugal from Key Largo, check out the most reliable airlines to get you to your destination on time: Emirates (75%), JetBlue (51%), TAP AIR PORTUGAL( 51%).

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

    The cheapest flight price from Key Largo to Portugal is $232. On average you can expect to pay $1,953. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $509.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $612). Flying from Key Largo to Portugal in June is currently the most expensive (average of $1,203). 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

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Top 10 airlines flying from Key Largo to Portugal

Discover the top 10 airlines that operate flights from Key Largo to Portugal. 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$322Average$739FlexibilityNo cancel feeOn-time77%
FinnairCheapest$370Average$673FlexibilityNo cancel feeOn-time76%
SWISSCheapest$377Average$599FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$454Average$830FlexibilityNo cancel feeOn-timeN/A
Air EuropaCheapest$461Average$709FlexibilityNo cancel feeOn-time83%
IberiaCheapest$471Average$736FlexibilityNo cancel feeOn-time77%
VuelingCheapest$472Average$526FlexibilityNo cancel feeOn-time88%
Air CanadaCheapest$477Average$864FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$479Average$824FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$494Average$686FlexibilityNo cancel feeOn-time76%

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