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$259+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$488
(Kiwi.com)

One-way from

$274
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$700
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. 21% potential increase in price ($228 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 March 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 March 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:15 pmMIA - FAO
1 stop20h 25mMultiple Airlines
Tue 5/276:20 amFAO - MIA
1 stop37h 00mMultiple Airlines
Deal found 3/29$488
This Gurufare deal was found by Cheapflights users on 3/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:45 pmMIA - OPO
1 stop12h 30mAir Europa
Tue 11/117:35 amOPO - MIA
1 stop16h 50mAir Europa
Deal found 3/29$517
This FlightHub deal was found by Cheapflights users on 3/30. 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.
Wed 9/244:30 pmMIA - OPO
1 stop11h 30mTAP AIR PORTUGAL
Fri 10/311:00 amOPO - MIA
1 stop15h 45mTAP AIR PORTUGAL
Deal found 3/30$533
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:30 amMIA - OPO
2 stops19h 10mMultiple Airlines
Tue 11/118:20 amOPO - MIA
1 stop17h 25mMultiple Airlines
Deal found 3/31$535
This SWISS deal was found by Cheapflights users on 3/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:50 pmMIA - OPO
1 stop17h 50mSWISS
Wed 11/127:30 pmOPO - MIA
1 stop24h 10mSWISS
Deal found 3/31$538
This Air Canada deal was found by Cheapflights users on 3/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:05 pmMIA - OPO
2 stops38h 10mAir Canada
Sat 11/88:40 amOPO - MIA
2 stops18h 57mAir Canada
Deal found 3/29$565
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/75:15 pmMIA - FNC
1 stop24h 50mMultiple Airlines
Wed 5/213:05 pmFNC - MIA
1 stop28h 15mMultiple Airlines
Deal found 3/30$566
This Expedia deal was found by Cheapflights users on 3/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/315:30 pmMIA - OPO
2 stops14h 15mIberia
Sat 11/88:40 pmOPO - MIA
2 stops23h 05mIberia
Deal found 3/29$572
This United Airlines deal was found by Cheapflights users on 3/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:00 pmMIA - OPO
2 stops22h 15mUnited Airlines
Mon 11/106:00 amOPO - MIA
2 stops37h 40mUnited Airlines
Deal found 3/29$577
This Lufthansa deal was found by Cheapflights users on 3/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:45 pmMIA - OPO
2 stops15h 05mLufthansa
Wed 11/1212:30 pmOPO - MIA
2 stops33h 25mLufthansa
Deal found 3/29$606
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/198:53 amMIA - LIS
2 stops33h 27mMultiple Airlines
Thu 5/2911:35 amLIS - MIA
1 stop12h 10mMultiple Airlines
Deal found 3/31$607
This Aeromexico deal was found by Cheapflights users on 3/31. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:59 pmMIA - LIS
1 stop33h 01mAir France
Mon 11/106:30 pmLIS - MIA
2 stops29h 09mAir France
Deal found 3/31$610

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 March 31, 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

Mon 5/12

5:15 pm-6:40 pm

1 stop20h 25m

Faro

Tue 5/27

6:20 am-2:20 pm

1 stop37h 00m

$488

MiamiFunchal

MIA - FNC

MIAFNC

Miami

Wed 5/7

5:15 pm-11:05 pm

1 stop24h 50m

Funchal Madeira

Wed 5/21

3:05 pm-2:20 pm

1 stop28h 15m

$566

MiamiPorto

MIA - OPO

MIAOPO

Miami

Sun 4/6

9:30 pm-7:20 pm

1 stop16h 50m

Porto

Mon 4/14

8:10 pm-6:45 pm

1 stop27h 35m

$571

MiamiPorto

MIA - OPO

MIAOPO

Miami

Mon 5/12

5:15 pm-9:50 am

2 stops35h 35m

Porto

Tue 5/20

11:35 am-6:45 pm

1 stop12h 10m

$596

MiamiLisbon

MIA - LIS

MIALIS

Miami

Mon 5/19

8:53 am-11:20 pm

2 stops33h 27m

Lisbon Humberto Delgado

Thu 5/29

11:35 am-6:45 pm

1 stop12h 10m

$607

MiamiLisbon

MIA - LIS

MIALIS

Miami

Wed 9/24

9:45 pm-5:05 pm

1 stop14h 20m

Lisbon Humberto Delgado

Wed 10/8

6:35 am-3:05 pm

1 stop13h 30m

$608

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 5/14

10:50 pm-8:25 am

1 stop28h 35m

Porto

Wed 5/21

6:15 am-6:49 pm

2 stops17h 34m

$610

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 8/12

10:51 am-9:20 am

2 stops17h 29m

Lisbon Humberto Delgado

Thu 8/21

12:55 pm-3:07 pm

2 stops31h 12m

$621

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 4/29

5:00 pm-3:30 pm

1 stop17h 30m

Lisbon Humberto Delgado

Tue 5/13

8:25 am-8:15 pm

1 stop16h 50m

$625

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 4/23

5:13 pm-6:40 pm

2 stops20h 27m

Porto

Wed 5/7

8:15 am-3:25 pm

1 stop12h 10m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 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 $1,213). 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 March 31, 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.

Weekly flight availability from Key Largo to Portugal

Explore weekly flight availability from Key Largo to Portugal. 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 March 31, 2025.

The most flights from KE9 to PT0 are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

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 March 31, 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
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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
7.4
Good
1,425 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

8.0

Overall

8.0

Food

7.3

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, 120 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 Vueling ($319), TAP AIR PORTUGAL ($328), and Air Canada ($342).

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

    Most travelers choose Miami - Lisbon Humberto Delgado, Miami - Porto or Miami - Faro 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 (73%), Etihad Airways (64%), JetBlue( 61%).

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

    The cheapest flight price from Key Largo to Portugal is $250. On average you can expect to pay $2,554. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $527.

  • 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 $1,213). 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest$370Average$673FlexibilityNo cancel feeOn-time76%
SWISSCheapest$377Average$612FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$454Average$853FlexibilityNo cancel feeOn-timeN/A
Air EuropaCheapest$462Average$723FlexibilityNo cancel feeOn-time83%
IberiaCheapest$471Average$741FlexibilityNo cancel feeOn-time77%
VuelingCheapest$472Average$526FlexibilityNo cancel feeOn-time88%
Air CanadaCheapest$477Average$756FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$479Average$819FlexibilityNo cancel feeOn-time71%
Royal Air MarocCheapest$489Average$592FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$494Average$675FlexibilityNo cancel feeOn-time76%
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