Porto

$280+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Apr 7 — Apr 141
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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 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$632
(Kiwi.com)

One-way from

$280
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,048
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. 14% potential increase in price ($169 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($25 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 2, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/11:00 pmLAX - OPO
1 stop35h 50mMultiple Airlines
Thu 5/88:50 amOPO - LAX
1 stop38h 25mMultiple Airlines
Deal found 4/1$632
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2711:23 amLAX - OPO
2 stops17h 22mAmerican Airlines
Mon 11/38:20 amOPO - LAX
2 stops21h 01mAmerican Airlines
Deal found 4/1$645
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:30 amLAX - OPO
2 stops22h 20mDelta
Wed 11/55:00 amOPO - LAX
2 stops20h 45mDelta
Deal found 3/31$656
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:45 pmLAX - OPO
2 stops19h 20mScandinavian Airlines
Fri 11/145:55 pmOPO - LAX
1 stop31h 05mScandinavian Airlines
Deal found 3/30$658
This United Airlines deal was found by Cheapflights users on 4/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/208:05 amLAX - OPO
1 stop17h 15mUnited Airlines
Thu 9/1112:10 pmOPO - LAX
2 stops33h 56mUnited Airlines
Deal found 4/1$673
This Brussels Airlines deal was found by Cheapflights users on 4/1. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:30 pmLAX - OPO
2 stops34h 35mBrussels Airlines
Sun 11/3012:55 pmOPO - LAX
2 stops58h 20mBrussels Airlines
Deal found 4/1$679
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:30 pmLAX - OPO
1 stop22h 05mLufthansa
Fri 11/146:15 amOPO - LAX
1 stop17h 00mLufthansa
Deal found 3/30$693
This Orbitz deal was found by Cheapflights users on 4/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/87:35 pmLAX - OPO
1 stop28h 10mSWISS
Tue 4/158:40 amOPO - LAX
1 stop15h 50mSWISS
Deal found 4/1$707
This Air Canada deal was found by Cheapflights users on 4/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/206:00 amLAX - OPO
2 stops19h 35mAir Canada
Wed 10/86:00 amOPO - LAX
2 stops23h 28mAir Canada
Deal found 4/1$742
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/34:40 pmLAX - OPO
1 stop14h 40mTAP AIR PORTUGAL
Fri 8/159:15 pmOPO - LAX
1 stop25h 25mTAP AIR PORTUGAL
Deal found 3/31$764
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1312:10 amLAX - OPO
1 stop25h 40mTurkish Airlines
Tue 10/2110:50 amOPO - LAX
1 stop32h 55mTurkish Airlines
Deal found 3/31$806

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 2, 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 5/1

1:00 pm-8:50 am

1 stop35h 50m

Porto

Thu 5/8

8:50 am-3:15 pm

1 stop38h 25m

$632

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 8/20

8:05 am-9:20 am

1 stop17h 15m

Porto

Thu 9/11

12:10 pm-2:06 pm

2 stops33h 56m

$673

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 9/20

7:30 pm-11:10 am

1 stop31h 40m

Porto

Wed 10/8

11:50 am-4:20 pm

1 stop36h 30m

$692

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 4/21

8:15 am-11:30 am

2 stops43h 15m

Porto

Wed 4/30

8:40 am-4:30 pm

1 stop15h 50m

$712

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 4/22

5:30 pm-11:20 pm

1 stop21h 50m

Porto

Fri 5/2

6:15 am-3:15 pm

1 stop17h 00m

$714

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 8/3

4:40 pm-5:00 pm

1 stop16h 20m

Porto

Mon 8/18

10:35 pm-2:40 pm

1 stop24h 05m

$730

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 4/30

8:55 am-10:40 am

2 stops17h 45m

Porto

Fri 5/9

6:40 am-9:25 pm

2 stops22h 45m

$731

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 9/20

6:00 am-9:35 am

2 stops19h 35m

Porto

Wed 10/8

6:00 am-9:28 pm

2 stops23h 28m

$742

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 4/30

3:25 pm-8:25 am

1 stop33h 00m

Porto

Fri 5/9

9:20 am-6:10 pm

1 stop16h 50m

$771

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 4/24

5:50 pm-3:55 pm

1 stop14h 05m

Porto

Mon 5/5

8:15 am-8:45 pm

2 stops20h 30m

$830

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 24 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 March 28, 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 2, 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 2, 2025.
Read through reviews of airlines operating flights from Riverside to Porto, such as Delta, Air Transat and SWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

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 Iberia ($473), TAP AIR PORTUGAL ($508), and Scandinavian Airlines ($547).

  • 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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Alternative routes for Riverside to Porto

See prices for flight routes from nearby airports that may be better suited for you.

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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$433Average$593FlexibilityNo cancel feeOn-timeN/A
VuelingCheapest$504Average$800FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$663Average$963FlexibilityNo cancel feeOn-time71%
SWISSCheapest$674Average$1,023FlexibilityNo cancel feeOn-time79%
KLMCheapest$682Average$1,063FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$688Average$791FlexibilityNo cancel feeOn-time77%
IberiaCheapest$690Average$1,021FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$690Average$940FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$697Average$980FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$760Average$1,081FlexibilityNo cancel feeOn-time76%

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