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Portugal

$262+ Cheap flights from Riverside, 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LIS
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Riverside to Portugal

Cheapest flights from Riverside to Portugal
Explore the most affordable flight options available from Riverside to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amLAX - LIS
1 stop15h 55mBritish Airways
Mon 1/126:35 pmLIS - LAX
1 stop26h 55mBritish Airways
Deal found 12/13$517
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:10 pmLAX - LIS
1 stop35h 25mMultiple Airlines
Sun 12/212:10 pmLIS - LAX
1 stop33h 05mMultiple Airlines
Deal found 12/13$556
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:30 pmLAX - LIS
1 stop22h 00mLufthansa
Mon 12/2211:55 amLIS - LAX
1 stop16h 49mLufthansa
Deal found 12/14$559
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:20 amLAX - LIS
1 stop13h 50mUnited Airlines
Sun 12/2111:55 amLIS - LAX
1 stop21h 04mUnited Airlines
Deal found 12/13$560
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:20 amLAX - LIS
1 stop16h 50mMultiple Airlines
Mon 12/223:25 pmLIS - LAX
2 stops35h 20mMultiple Airlines
Deal found 12/13$571
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 pmLAX - LIS
1 stop22h 00mLufthansa
Mon 1/123:55 pmLIS - LAX
2 stops34h 50mLufthansa
Deal found 12/14$574
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:00 amLAX - LIS
2 stops19h 10mUnited Airlines
Mon 1/1210:15 amLIS - LAX
2 stops19h 29mUnited Airlines
Deal found 12/15$579
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:00 pmLAX - LIS
1 stop28h 55mBritish Airways
Mon 1/126:35 pmLIS - LAX
1 stop31h 55mBritish Airways
Deal found 12/13$584
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:28 amLAX - LIS
1 stop13h 27mMultiple Airlines
Sun 1/1111:05 amLIS - LAX
1 stop18h 48mMultiple Airlines
Deal found 12/14$589
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:45 pmLAX - OPO
1 stop31h 05mTurkish Airlines
Mon 1/510:55 amOPO - LAX
1 stop32h 15mTurkish Airlines
Deal found 12/14$834
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:45 pmLAX - FNC
1 stop15h 45mTAP AIR PORTUGAL
Mon 1/124:10 amFNC - LAX
1 stop18h 50mTAP AIR PORTUGAL
Deal found 12/14$888
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:59 pmLAX - OPO
2 stops32h 01mUnited Airlines
Mon 1/512:30 pmOPO - LAX
1 stop32h 35mUnited Airlines
Deal found 12/14$927

Find flight deals from Riverside to Portugal

Keep the following information in mind while searching for Riverside to Portugal flight deals. Data was last updated December 15, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$436
(Kiwi.com)

One-way from

$262
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,122
Provider with most accurate pricing for Los Angeles-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Lisbon Humberto Delgado flights.
Search Deals
From Riverside to Portugal
Search Deals
One-way flight from Riverside to Portugal
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 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 Riverside 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 December 15, 2025.
Use the filters below to find and compare flights from Riverside to Portugal that are best for you.

Fly from

Riverside

Fly to

Portugal

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 1/15

7:10 pm-11:10 am

1 stop32h 00m

Porto

Sat 1/24

6:00 am-9:28 pm

2 stops23h 28m

$463

Los AngelesFaro

LAX - FAO

LAXFAO

Los Angeles

Fri 2/27

1:45 pm-9:05 am

1 stop35h 20m

Faro

Sun 3/8

6:50 pm-12:45 pm

1 stop24h 55m

$482

Los AngelesFaro

LAX - FAO

LAXFAO

Los Angeles

Wed 1/28

1:45 pm-6:15 pm

1 stop20h 30m

Faro

Wed 2/4

10:20 am-11:45 am

1 stop33h 25m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 3/2

7:20 am-10:30 am

2 stops19h 10m

Porto

Mon 3/9

5:00 am-12:45 pm

1 stop14h 45m

$483

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

8:45 am-10:30 am

2 stops17h 45m

Porto

Wed 2/18

5:00 am-11:45 am

1 stop14h 45m

$483

Los AngelesFaro

LAX - FAO

LAXFAO

Los Angeles

Mon 1/12

11:55 am-6:55 pm

2 stops23h 00m

Faro

Wed 1/28

10:20 am-11:45 am

1 stop33h 25m

$483

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 3/5

1:45 pm-10:25 pm

1 stop24h 40m

Porto

Sun 3/15

11:15 am-12:45 pm

1 stop32h 30m

$484

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 1/12

9:35 pm-10:30 am

2 stops28h 55m

Porto

Mon 1/26

5:00 am-10:21 pm

2 stops25h 21m

$485

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 1/11

6:25 am-10:30 am

2 stops20h 05m

Porto

Sat 1/24

5:00 am-9:18 pm

2 stops24h 18m

$485

Los AngelesFaro

LAX - FAO

LAXFAO

Los Angeles

Thu 3/12

1:25 pm-7:20 pm

2 stops22h 55m

Faro

Wed 3/18

6:55 pm-12:45 pm

1 stop24h 50m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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

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

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

Currently, May is the cheapest month in which you can book a flight from Riverside to Portugal (average of $403). Flying from Riverside to Portugal in June is currently the most expensive (average of $672). 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 R1V to PT?

Find hourly flight availability from Riverside 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 December 15, 2025.

When flying from Riverside to Portugal, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 31% versus a flight in the morning.

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

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

Travelers seeking maximum savings on their Riverside to Portugal flight should consider departing on Friday 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 December 15, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and TAP AIR PORTUGAL from Riverside to Portugal. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
9,092 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7.2
Good
2,089 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
10,525 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7,575 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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 Riverside 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 Riverside to Portugal flight route?

    Within the past month, 56 users have taken a look at flights from Riverside to Portugal.

  • How long is the flight from Riverside to Portugal?

    KLM, Delta, and United Airlines can get you from Riverside to Portugal in just under 16h 35m. Your travel time can differ by up to 18h 45m. Riverside and Portugal are separated by a distance of 5674 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    For one-way options, check prices for LEVEL. According to our data, you can fly for as low as $225. Users have also found prices from $254 and $265 on Iberia and TAP AIR PORTUGAL, respectively.

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

    While some choose either Los Angeles - Porto or Los Angeles - Funchal Madeira, Los Angeles - Lisbon Humberto Delgado is the most popular route from Riverside to Portugal.

  • What are the cheapest flights from Riverside to Portugal?

    While on average a flight from Riverside to Portugal is generally $1,556, our data shows the cheapest flight currently is $226. When looking at the most popular route, (Los Angeles - Lisbon Humberto Delgado), you can expect to pay $428 for that flight.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Riverside to Portugal (average of $403). Flying from Riverside to Portugal in June is currently the most expensive (average of $672). 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 Riverside to Portugal

Discover the top 10 airlines that operate flights from Riverside 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$378Average$673FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$395Average$935FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$447Average$861FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$469Average$736FlexibilityNo cancel feeOn-time77%
IberiaCheapest$475Average$808FlexibilityNo cancel feeOn-time77%
KLMCheapest$476Average$842FlexibilityNo cancel feeOn-time75%
DeltaCheapest$492Average$934FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$505Average$1,012FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$515Average$1,032FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$533Average$786FlexibilityNo cancel feeOn-time70%

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