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$304+ Cheap flights from Irvine, CA 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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LIS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Irvine to Portugal

Keep the following information in mind while searching for Irvine to Portugal flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$448
(Kiwi.com)

One-way from

$304
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$695
Provider with most accurate pricing for Los Angeles-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Lisbon Humberto Delgado flights.
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From Irvine to Portugal
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One-way flight from Irvine to Portugal
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Highest demand for flights based on searches. 7% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Irvine to Portugal

Cheapest flights from Irvine to Portugal
Explore the most affordable flight options available from Irvine to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Thu 11/275:30 pmLAX - OPO
1 stop22h 10mMultiple Airlines
Thu 12/47:25 pmOPO - LAX
1 stop29h 10mMultiple Airlines
Deal found 10/30$448
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:30 pmLAX - OPO
1 stop22h 10mMultiple Airlines
Fri 12/126:30 amOPO - LAX
2 stops22h 38mMultiple Airlines
Deal found 10/30$456
This Expedia deal was found by Cheapflights users on 10/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:30 pmLAX - OPO
1 stop22h 10mMultiple Airlines
Sat 12/611:55 amOPO - LAX
1 stop36h 40mMultiple Airlines
Deal found 10/30$479
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:45 amLAX - OPO
1 stop13h 45mUnited Airlines
Thu 12/46:00 amOPO - LAX
3 stops25h 20mUnited Airlines
Deal found 10/30$484
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:45 amLAX - OPO
2 stops20h 45mDelta
Sat 12/66:00 amOPO - LAX
2 stops24h 28mDelta
Deal found 10/30$492
This oojo deal was found by Cheapflights users on 10/30. 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.
Thu 11/277:10 pmLAX - OPO
1 stop32h 00mSWISS
Thu 12/412:05 pmOPO - LAX
1 stop36h 30mSWISS
Deal found 10/30$493
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:30 pmLAX - OPO
1 stop22h 10mLufthansa
Sat 12/61:45 pmOPO - LAX
2 stops31h 20mLufthansa
Deal found 10/30$510
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:30 amLAX - LIS
2 stops18h 50mMultiple Airlines
Mon 12/811:50 amLIS - LAX
1 stop36h 45mMultiple Airlines
Deal found 10/28$512
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:00 amLAX - LIS
2 stops19h 35mLufthansa
Mon 11/242:10 pmLIS - LAX
1 stop33h 05mLufthansa
Deal found 10/29$513
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:10 pmLAX - LIS
1 stop32h 35mSWISS
Tue 11/253:25 pmLIS - LAX
1 stop33h 10mSWISS
Deal found 10/29$514
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:30 pmLAX - LIS
1 stop12h 50mUnited Airlines
Thu 12/2510:55 amLIS - LAX
1 stop19h 05mUnited Airlines
Deal found 10/28$515
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:30 pmLAX - LIS
1 stop26h 30mDelta
Tue 1/1310:00 amLIS - LAX
2 stops20h 01mDelta
Deal found 10/29$516

Cheapflights Fare Finder

 
Customize your flight search to find flights from Irvine 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 October 30, 2025.
Use the filters below to find and compare flights from Irvine to Portugal that are best for you.

Fly from

Irvine

Fly to

Portugal

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 1/17

7:10 pm-6:35 pm

1 stop15h 25m

Porto

Sat 1/24

6:00 am-5:17 pm

2 stops19h 17m

$479

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

7:10 pm-11:10 am

1 stop32h 00m

Porto

Wed 2/18

12:10 pm-4:35 pm

1 stop36h 25m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 2/10

7:10 pm-11:15 am

1 stop32h 05m

Porto

Fri 2/20

7:20 pm-4:35 pm

1 stop29h 15m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 11/27

11:45 am-9:30 am

1 stop13h 45m

Porto

Thu 12/4

6:00 am-11:20 pm

3 stops25h 20m

$484

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 11/29

5:45 am-10:30 am

2 stops20h 45m

Porto

Sat 12/6

6:00 am-10:28 pm

2 stops24h 28m

$492

Los AngelesLisbon

LAX - LIS

LAXLIS

Los Angeles

Tue 11/11

5:30 pm-11:30 pm

1 stop22h 00m

Lisbon Humberto Delgado

Thu 11/27

10:15 am-7:35 am

2 stops29h 20m

$512

Los AngelesLisbon

LAX - LIS

LAXLIS

Los Angeles

Thu 1/15

12:30 am-9:20 am

2 stops24h 50m

Lisbon Humberto Delgado

Tue 1/20

6:10 am-3:15 pm

1 stop17h 05m

$516

Los AngelesLisbon

LAX - LIS

LAXLIS

Los Angeles

Mon 12/29

11:30 pm-10:15 am

1 stop26h 45m

Lisbon Humberto Delgado

Wed 1/14

10:15 am-8:44 pm

2 stops18h 29m

$516

Los AngelesLisbon

LAX - LIS

LAXLIS

Los Angeles

Wed 1/28

3:25 pm-3:10 pm

1 stop15h 45m

Lisbon Humberto Delgado

Sun 2/8

5:00 am-6:40 pm

2 stops21h 40m

$521

Los AngelesLisbon

LAX - LIS

LAXLIS

Los Angeles

Thu 1/1

7:55 am-8:00 am

1 stop16h 05m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-6:40 pm

2 stops21h 40m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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Best time to book a flight from Irvine to Portugal

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

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

Currently, May is the cheapest month in which you can book a flight from Irvine to Portugal (average of $413). Flying from Irvine to Portugal in June is currently the most expensive (average of $671). 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 IR9 to PT?

Find hourly flight availability from Irvine 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 October 30, 2025.

It’s typically best to fly out from Irvine to Portugal in the evening. Doing so could potentially save you 30% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Irvine to Portugal?

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

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

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 October 30, 2025.
See what other customers who have flown with Delta, United Airlines, and Air Canada from Irvine to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
10,381 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
TAP AIR PORTUGAL
7.1
Good
2,040 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
7,487 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Irvine 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 Irvine to Portugal flight route?

    Flights from Irvine to Portugal have been viewed 51 times in the past calendar month.

  • How long is the flight from Irvine to Portugal?

    For as low as $484, SWISS can have you in Portugal from Irvine in 13h 45m. The distance from Irvine to Portugal is about 5588 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $305 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on KLM and Air Canada, with prices starting from $306 and $453, respectively.

  • What are the most popular routes from Irvine to Portugal?

    The most popular flight routes from Irvine to Portugal are Los Angeles - Lisbon Humberto Delgado, Los Angeles - Porto and Los Angeles - Ponta Delgada Nordela.

  • What are the cheapest flights from Irvine to Portugal?

    Looking at all options, your cheapest flight can be booked for $176. While the most popular route (Los Angeles - Lisbon Humberto Delgado) can be booked for $438 on average, our data indicates $872 when flying from Irvine to Portugal.

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

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

  • How can I find direct flights from Irvine to Portugal?

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

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

    Yes. Cheapflights offers flight deals from Irvine 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 Irvine to Portugal?

    Currently, May is the cheapest month in which you can book a flight from Irvine to Portugal (average of $413). Flying from Irvine to Portugal in June is currently the most expensive (average of $671). 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 Irvine to Portugal

Discover the top 10 airlines that operate flights from Irvine 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$385Average$613FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$472Average$980FlexibilityNo cancel feeOn-time79%
IberiaCheapest$480Average$840FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$498Average$944FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$505Average$1,028FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$514Average$694FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$515Average$1,065FlexibilityNo cancel feeOn-time69%
VuelingCheapest$522Average$667FlexibilityNo cancel feeOn-time88%
British AirwaysCheapest$533Average$797FlexibilityNo cancel feeOn-time70%
DeltaCheapest$540Average$933FlexibilityNo cancel feeOn-timeN/A

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