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Portugal

$226+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LIS
ago 6 — ago 131
qua 8/6
qua 8/13
1 adult, Economy
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Cheap flight deals from Riverside to Portugal

Keep the following information in mind while searching for Riverside to Portugal flight deals. Data was last updated agosto 1, 2025.

Round-trip from

$467
(Kiwi.com)

One-way from

$226
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$928
From Riverside to Portugal
Search Deals
One-way flight from Riverside to Portugal
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Highest demand for flights based on searches. 4% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 agosto 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
dom 10/54:30 pmLAX - OPO
1 stop32h 45mMultiple Airlines
sáb 10/189:50 pmOPO - LAX
1 stop24h 20mMultiple Airlines
Deal found 7/30$467
This Scandinavian Airlines deal was found by Cheapflights users on 7/31. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 9/297:30 pmLAX - OPO
1 stop31h 30mScandinavian Airlines
sex 10/175:55 pmOPO - LAX
1 stop30h 25mScandinavian Airlines
Deal found 7/31$508
This Mytrip deal was found by Cheapflights users on 7/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 9/228:05 amLAX - FAO
2 stops25h 10mMultiple Airlines
ter 10/76:15 pmFAO - LAX
3 stops32h 43mMultiple Airlines
Deal found 7/31$531
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 8/175:50 pmLAX - FNC
1 stop16h 30mIberia
ter 9/23:50 pmFNC - LAX
2 stops32h 15mIberia
Deal found 7/30$568
This oojo deal was found by Cheapflights users on 8/1. 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.
ter 10/285:45 pmLAX - OPO
1 stop18h 10mTAP AIR PORTUGAL
qua 11/58:00 pmOPO - LAX
1 stop27h 00mTAP AIR PORTUGAL
Deal found 8/1$576
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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.
qui 11/134:45 pmLAX - PDL
1 stop24h 00mTAP AIR PORTUGAL
qua 11/197:25 pmPDL - LAX
1 stop26h 35mTAP AIR PORTUGAL
Deal found 7/30$579
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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.
ter 12/24:45 pmLAX - FNC
1 stop22h 10mTAP AIR PORTUGAL
sex 12/124:10 amFNC - LAX
1 stop18h 50mTAP AIR PORTUGAL
Deal found 7/30$580
This United Airlines deal was found by Cheapflights users on 7/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 10/281:15 pmLAX - OPO
1 stop13h 15mUnited Airlines
qua 11/56:00 amOPO - LAX
2 stops22h 35mUnited Airlines
Deal found 7/31$589
This Iberia deal was found by Cheapflights users on 7/31. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 11/97:50 pmLAX - OPO
1 stop17h 25mIberia
qua 11/199:55 pmOPO - LAX
1 stop29h 15mIberia
Deal found 7/31$599
This SWISS deal was found by Cheapflights users on 7/31. 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.
dom 11/97:10 pmLAX - OPO
1 stop32h 05mSWISS
qui 11/2012:05 pmOPO - LAX
1 stop36h 30mSWISS
Deal found 7/31$602
This Ovago deal was found by Cheapflights users on 7/31. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 11/117:00 amLAX - OPO
2 stops16h 40mBritish Airways
qui 11/2012:25 pmOPO - LAX
2 stops20h 21mBritish Airways
Deal found 7/31$603
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
dom 9/74:30 pmLAX - PDL
1 stop35h 50mMultiple Airlines
ter 9/2312:15 pmPDL - LAX
1 stop32h 55mMultiple Airlines
Deal found 7/31$605

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 agosto 1, 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

dom 10/5

4:30 pm-9:15 am

1 stop32h 45m

Porto

sáb 10/18

9:50 pm-2:10 pm

1 stop24h 20m

$467

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

seg 9/29

7:30 pm-11:00 am

1 stop31h 30m

Porto

sex 10/17

5:55 pm-4:20 pm

1 stop30h 25m

$507

Los AngelesFaro

LAX - FAO

LAXFAO

Los Angeles

seg 9/22

8:05 am-5:15 pm

2 stops25h 10m

Faro

ter 10/7

6:15 pm-6:58 pm

3 stops32h 43m

$531

Los AngelesFunchal

LAX - FNC

LAXFNC

Los Angeles

dom 8/17

5:50 pm-6:20 pm

1 stop16h 30m

Funchal Madeira

ter 9/2

3:50 pm-4:05 pm

2 stops32h 15m

$568

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

ter 10/28

5:45 pm-6:55 pm

1 stop18h 10m

Porto

qua 11/5

8:00 pm-3:00 pm

1 stop27h 00m

$576

Los AngelesPonta Delgada

LAX - PDL

LAXPDL

Los Angeles

qui 11/13

4:45 pm-11:45 pm

1 stop24h 00m

Ponta Delgada Nordela

qua 11/19

7:25 pm-3:00 pm

1 stop26h 35m

$579

Los AngelesFunchal

LAX - FNC

LAXFNC

Los Angeles

ter 12/2

4:45 pm-10:55 pm

1 stop22h 10m

Funchal Madeira

sex 12/12

4:10 am-3:00 pm

1 stop18h 50m

$580

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

ter 1/6

7:50 pm-9:15 pm

1 stop17h 25m

Porto

qui 1/15

8:45 am-7:10 pm

1 stop18h 25m

$585

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

ter 10/28

1:15 pm-9:30 am

1 stop13h 15m

Porto

qua 11/5

6:00 am-8:35 pm

2 stops22h 35m

$589

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

dom 11/9

7:10 pm-11:15 am

1 stop32h 05m

Porto

qui 11/20

12:05 pm-4:35 pm

1 stop36h 30m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 56 results
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Riverside to Portugal (average of $612). Flying from Riverside to Portugal in June is currently the most expensive (average of $1,129). 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 agosto 1, 2025.

When flying from Riverside 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 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 Thursday afternoons when fares are most often at their lowest. Friday afternoons 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 agosto 1, 2025.
Read reviews from past customers who have flown Delta, KLM, and Austrian Airlines 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
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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 France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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, 41 users have taken a look at flights from Riverside to Portugal.

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

    For one-way options, check prices for Iberia. According to our data, you can fly for as low as $307. Users have also found prices from $345 and $350 on Delta and Virgin Atlantic, respectively.

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

    While some choose either Los Angeles - Porto or Los Angeles - Faro, 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 $1,616, our data shows the cheapest flight currently is $281. When looking at the most popular route, (Los Angeles - Lisbon Humberto Delgado), you can expect to pay $482 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, January is the cheapest month in which you can book a flight from Riverside to Portugal (average of $612). Flying from Riverside to Portugal in June is currently the most expensive (average of $1,129). 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.

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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 agosto 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$402Average$609FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$516Average$1,012FlexibilityNo cancel feeOn-time79%
VuelingCheapest$518Average$752FlexibilityNo cancel feeOn-time88%
IberiaCheapest$535Average$893FlexibilityNo cancel feeOn-time77%
DeltaCheapest$540Average$932FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$540Average$873FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$555Average$709FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$564Average$857FlexibilityNo cancel feeOn-time72%
TAP AIR PORTUGALCheapest$565Average$1,031FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$568Average$1,150FlexibilityNo cancel feeOn-time69%

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