Porto

$283+ Cheap flights from Riverside, CA to Porto (OPO)

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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Apr 22 — Apr 291
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Cheapflights Tip: The best prices from Riverside to Porto are usually found in February or October, booked 86 days in advance, depart on a Wednesday or Sunday and return on a Tuesday

Cheap flight deals from Riverside to Porto

Keep the following information in mind while searching for Riverside to Porto flight deals. Data was last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$694
(Kiwi.com)

One-way from

$283
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,066
Provider with most accurate pricing for Los Angeles-Porto flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Porto flights.
From Riverside to Porto
One-way flight from Riverside to Porto
Highest demand for flights based on searches. 13% potential increase in price ($144 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
Average for round-trip flights in April 2025

Find flight deals from Riverside to Porto

Cheapest flights from Riverside to Porto
Explore the most affordable flight options available from Riverside to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/16. 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 4/249:25 pmLAX - OPO
1 stop17h 30mMultiple Airlines
Sat 5/176:25 amOPO - LAX
1 stop20h 40mMultiple Airlines
Deal found 4/16$694
This FlightHub deal was found by Cheapflights users on 4/16. 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 9/284:40 pmLAX - OPO
1 stop14h 40mTAP AIR PORTUGAL
Thu 10/99:15 pmOPO - LAX
1 stop25h 20mTAP AIR PORTUGAL
Deal found 4/16$703
This Scandinavian Airlines deal was found by Cheapflights users on 4/16. 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.
Sat 9/277:30 pmLAX - OPO
1 stop31h 40mScandinavian Airlines
Wed 10/811:50 amOPO - LAX
1 stop36h 30mScandinavian Airlines
Deal found 4/16$707
This Air Canada deal was found by Cheapflights users on 4/16. 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.
Wed 7/98:05 amLAX - OPO
1 stop17h 15mAir Canada
Tue 8/2612:50 pmOPO - LAX
2 stops32h 36mAir Canada
Deal found 4/16$775
This Delta deal was found by Cheapflights users on 4/16. 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 9/277:00 amLAX - OPO
2 stops17h 25mDelta
Fri 10/1011:25 amOPO - LAX
2 stops20h 26mDelta
Deal found 4/16$789
This KLM deal was found by Cheapflights users on 4/16. 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.
Sun 9/71:40 pmLAX - OPO
1 stop17h 50mKLM
Mon 9/154:20 pmOPO - LAX
1 stop30h 30mKLM
Deal found 4/16$809
This FlightHub deal was found by Cheapflights users on 4/16. 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.
Tue 5/207:55 pmLAX - OPO
1 stop35h 55mTurkish Airlines
Tue 6/174:50 pmOPO - LAX
1 stop26h 55mTurkish Airlines
Deal found 4/16$813
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Fri 9/2610:30 pmLAX - OPO
1 stop27h 05mUnited Airlines
Wed 10/86:00 amOPO - LAX
1 stop18h 55mUnited Airlines
Deal found 4/16$857
This Lufthansa deal was found by Cheapflights users on 4/16. 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.
Thu 9/256:40 pmLAX - OPO
1 stop20h 05mLufthansa
Wed 10/86:15 amOPO - LAX
1 stop17h 00mLufthansa
Deal found 4/16$880
This Ovago deal was found by Cheapflights users on 4/16. 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.
Thu 5/87:35 pmLAX - OPO
1 stop14h 55mSWISS
Mon 5/267:20 pmOPO - LAX
1 stop29h 10mSWISS
Deal found 4/16$885
This oojo deal was found by Cheapflights users on 4/16. 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.
Mon 9/82:40 pmLAX - OPO
2 stops17h 15mIberia
Mon 9/1512:20 pmOPO - LAX
2 stops19h 38mIberia
Deal found 4/16$996

Cheapflights Fare Finder

Customize your flight search to find flights from Riverside to Porto 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 April 17, 2025.
Use the filters below to find and compare flights from Riverside to Porto that are best for you.

Fly from

Riverside

Fly to

Porto

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 4/24

9:25 pm-10:55 pm

1 stop17h 30m

Porto

Wed 5/14

6:45 am-7:05 pm

1 stop20h 20m

$694

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 7/9

8:05 am-9:20 am

1 stop17h 15m

Porto

Tue 8/26

12:50 pm-1:26 pm

2 stops32h 36m

$775

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 5/20

7:55 pm-3:50 pm

1 stop35h 55m

Porto

Tue 6/17

4:50 pm-11:45 am

1 stop26h 55m

$813

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 5/8

7:35 pm-6:30 pm

1 stop14h 55m

Porto

Mon 5/26

7:20 pm-4:30 pm

1 stop29h 10m

$885

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 5/28

1:50 pm-7:35 pm

1 stop21h 45m

Porto

Thu 6/26

8:20 pm-11:50 am

1 stop23h 30m

$910

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 5/19

7:30 pm-11:00 am

1 stop31h 30m

Porto

Wed 6/4

12:15 pm-8:31 pm

2 stops40h 16m

$925

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 5/8

12:00 pm-3:30 pm

2 stops19h 30m

Porto

Sat 5/24

6:05 am-2:50 pm

1 stop16h 45m

$939

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 7/13

10:30 pm-9:35 am

1 stop27h 05m

Porto

Wed 7/30

6:00 am-4:55 pm

1 stop18h 55m

$957

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 7/14

5:30 pm-11:20 pm

1 stop21h 50m

Porto

Mon 7/28

11:05 am-3:15 pm

1 stop36h 10m

$986

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 7/15

3:05 pm-9:35 am

1 stop34h 30m

Porto

Mon 7/28

10:25 am-3:15 pm

2 stops36h 50m

$1,010

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 22 results
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Best time to book a flight from Riverside to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

How far ahead should I book a flight from Riverside to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Riverside to Porto. Price data was last updated on April 11, 2025.

The best time to book flights from Riverside to Porto is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Riverside to Porto (average of $523). Flying from Riverside to Porto in June is currently the most expensive (average of $1,081). 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 OPO?

Find hourly flight availability from Riverside to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Riverside to Porto as you normally would.

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

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

Travelers seeking maximum savings on their Riverside to Porto flight should consider departing on Sunday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated April 17, 2025.
Read through reviews of airlines operating flights from Riverside to Porto, such as Delta, KLM and Air Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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.
8.0
Very good
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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.
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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.
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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.
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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.
8.0
Very good

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

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 Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Porto from Riverside?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Riverside to Porto. 13 airlines have flights to Porto from Riverside on a regular basis. Booking flights from Riverside to Porto should not be difficult; the airport handles an average of 0 inbound flights from Riverside per day.

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

    The cheapest airlines for a one-way flight from Riverside to Porto are TAP AIR PORTUGAL ($332), Vueling ($397), and Scandinavian Airlines ($464).

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Riverside to Porto (average of $523). Flying from Riverside to Porto in June is currently the most expensive (average of $1,081). 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

Traveling to a place near Riverside?

Book flights to Riverside if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Top 10 airlines flying from Riverside to Porto

Discover the top 10 airlines that operate flights from Riverside to Porto. 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$433Average$598FlexibilityNo cancel feeOn-timeN/A
VuelingCheapest$502Average$753FlexibilityNo cancel feeOn-time88%
SWISSCheapest$636Average$997FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$663Average$963FlexibilityNo cancel feeOn-time71%
IberiaCheapest$668Average$1,004FlexibilityNo cancel feeOn-time77%
KLMCheapest$682Average$1,055FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$688Average$805FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$690Average$940FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$697Average$960FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$760Average$1,065FlexibilityNo cancel feeOn-time76%

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