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$278+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
févr. 25 — mars 41
mar. 2/25
mar. 3/4
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 février 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$478
(Kiwi.com)

One-way from

$278
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$591
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. 23% potential increase in price ($248 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in February 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 février 20, 2025.

This oojo deal was found by Cheapflights users on 2/20. 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. 3/2710:45 pmMIA - OPO
1 stop16h 35mAir Europa
mer. 4/911:35 amOPO - MIA
1 stop12h 10mAir Europa
Deal found 2/20$477
This Kiwi.com deal was found by Cheapflights users on 2/20. 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. 3/105:40 pmMIA - OPO
1 stop13h 35mSWISS
lun. 3/247:20 pmOPO - MIA
1 stop27h 10mSWISS
Deal found 2/20$500
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/102:30 pmMIA - OPO
2 stops18h 20mMultiple Airlines
lun. 3/247:20 pmOPO - MIA
1 stop27h 10mMultiple Airlines
Deal found 2/20$506
This Air Canada deal was found by Cheapflights users on 2/20. 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.
jeu. 3/272:30 pmMIA - OPO
2 stops22h 10mAir Canada
jeu. 4/38:40 amOPO - MIA
2 stops20h 14mAir Canada
Deal found 2/20$520
This KLM deal was found by Cheapflights users on 2/20. 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.
mer. 4/24:35 pmMIA - OPO
1 stop17h 55mKLM
mar. 4/86:20 amOPO - MIA
2 stops19h 12mKLM
Deal found 2/20$527
This United deal was found by Cheapflights users on 2/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/247:47 pmMIA - LIS
2 stops32h 23mUnited Airlines
mer. 4/211:25 amLIS - MIA
2 stops40h 19mUnited Airlines
Deal found 2/20$533
This oojo deal was found by Cheapflights users on 2/20. 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. 2/279:45 pmMIA - LIS
1 stop16h 30mAir Europa
mar. 3/117:40 amLIS - MIA
1 stop16h 45mAir Europa
Deal found 2/20$535
This United deal was found by Cheapflights users on 2/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/112:32 pmMIA - LIS
2 stops15h 43mMultiple Airlines
mar. 3/1812:35 pmLIS - MIA
1 stop33h 55mMultiple Airlines
Deal found 2/20$536
This United deal was found by Cheapflights users on 2/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 3/272:32 pmMIA - OPO
2 stops20h 38mUnited Airlines
jeu. 4/312:35 pmOPO - MIA
1 stop14h 21mUnited Airlines
Deal found 2/20$537
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 3/912:45 amMIA - OPO
1 stop17h 15mTAP AIR PORTUGAL
mer. 3/268:55 amOPO - MIA
1 stop17h 50mTAP AIR PORTUGAL
Deal found 2/20$538
This Delta deal was found by Cheapflights users on 2/20. 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.
sam. 3/17:15 pmMIA - LIS
1 stop32h 40mDelta
jeu. 3/1311:25 amLIS - MIA
1 stop32h 05mDelta
Deal found 2/20$539
This Delta deal was found by Cheapflights users on 2/20. 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.
mer. 4/211:41 amMIA - OPO
2 stops17h 59mDelta
mar. 4/86:20 amOPO - MIA
2 stops19h 12mDelta
Deal found 2/20$543

Find flights from Key Largo to Portugal within your budget

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 février 20, 2025.

Fly from

Key Largo

Fly to

Portugal

Route

Depart

Return

Price

MiamiPorto

MIA - OPO

MIAOPO

Miami

jeu. 3/27

10:45 pm-7:20 pm

1 stop16h 35m

Porto

mer. 4/9

11:35 am-6:45 pm

1 stop12h 10m

$477

MiamiPorto

MIA - OPO

MIAOPO

Miami

lun. 3/10

5:40 pm-11:15 am

1 stop13h 35m

Porto

lun. 3/24

7:20 pm-6:30 pm

1 stop27h 10m

$500

MiamiPorto

MIA - OPO

MIAOPO

Miami

lun. 3/10

2:30 pm-12:50 pm

2 stops18h 20m

Porto

lun. 3/24

7:20 pm-6:30 pm

1 stop27h 10m

$506

MiamiPorto

MIA - OPO

MIAOPO

Miami

jeu. 3/27

2:30 pm-4:40 pm

2 stops22h 10m

Porto

jeu. 4/3

8:40 am-11:54 pm

2 stops20h 14m

$520

MiamiPorto

MIA - OPO

MIAOPO

Miami

mer. 4/2

4:35 pm-3:30 pm

1 stop17h 55m

Porto

mar. 4/8

6:20 am-8:32 pm

2 stops19h 12m

$527

MiamiLisbon

MIA - LIS

MIALIS

Miami

lun. 3/24

7:47 pm-8:10 am

2 stops32h 23m

Lisbon Humberto Delgado

mer. 4/2

11:25 am-10:44 pm

2 stops40h 19m

$533

MiamiLisbon

MIA - LIS

MIALIS

Miami

jeu. 2/27

9:45 pm-7:15 pm

1 stop16h 30m

Lisbon Humberto Delgado

mar. 3/11

7:40 am-8:25 pm

1 stop16h 45m

$535

MiamiLisbon

MIA - LIS

MIALIS

Miami

mar. 3/11

12:23 pm-8:10 am

2 stops15h 47m

Lisbon Humberto Delgado

mar. 3/25

3:25 pm-6:30 pm

1 stop31h 05m

$536

MiamiPorto

MIA - OPO

MIAOPO

Miami

jeu. 3/27

2:32 pm-3:10 pm

2 stops20h 38m

Porto

jeu. 4/3

12:35 pm-9:56 pm

1 stop14h 21m

$537

MiamiPorto

MIA - OPO

MIAOPO

Miami

dim. 3/9

12:45 am-10:00 pm

1 stop17h 15m

Porto

mer. 3/26

8:55 am-10:45 pm

1 stop17h 50m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 57 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.

Travel insights for flights from Key Largo to Portugal

Get recent, data-driven insights about flights from Key Largo to Portugal including ideal travel times, pricing trends, and more.

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 $1,234). 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 février 20, 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 March 10, 2024.

Travelers seeking maximum savings on their Key Largo to Portugal flight should consider departing on Sunday 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 février 20, 2025.
To help decide which airline to fly from Key Largo to Portugal, see what other customers have to say about Delta, KLM and Finnair. 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
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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.

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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
1,568 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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, 97 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 British Airways ($282), Virgin Atlantic ($283), and American Airlines ($288).

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

    Most travelers choose Miami - Lisbon Humberto Delgado, Miami - Porto or Miami - Funchal Madeira 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: Etihad Airways (64%), JetBlue (55%), TAP AIR PORTUGAL( 55%).

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

    The cheapest flight price from Key Largo to Portugal is $295. On average you can expect to pay $1,449. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $497.

  • 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 $1,234). 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 février 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest$370Average$677FlexibilityNo cancel feeOn-time76%
SWISSCheapest$377Average$634FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$455Average$869FlexibilityNo cancel feeOn-timeN/A
Air EuropaCheapest$465Average$727FlexibilityNo cancel feeOn-time83%
VuelingCheapest$472Average$526FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$479Average$860FlexibilityNo cancel feeOn-time71%
Royal Air MarocCheapest$489Average$628FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$494Average$714FlexibilityNo cancel feeOn-time76%
IberiaCheapest$496Average$731FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$533Average$749FlexibilityNo cancel feeOn-time67%
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