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Portsmouth

$292+ Cheap flights from Riverside, CA to Portsmouth, England

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Riverside to Portsmouth

Keep the following information in mind while searching for Riverside to Portsmouth flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$764
(Delta)

One-way from

$292
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$809
Provider with most accurate pricing for Los Angeles-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-London (LON) flights.
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From Riverside to Portsmouth
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One-way flight from Riverside to Portsmouth
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Highest demand for flights based on searches. 15% potential increase in price ($200 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Riverside to Portsmouth

Cheapest flights from Riverside to Portsmouth
Explore the most affordable flight options available from Riverside to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Delta deal was found by Cheapflights users on 2/20. 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 3/182:45 pmLAX - SOU
1 stop19h 05mDelta
Tue 3/259:00 amSOU - LAX
2 stops20h 50mDelta
Deal found 2/20$764
This Gurufare deal was found by Cheapflights users on 2/18. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1712:31 amLAX - SOU
2 stops25h 14mAer Lingus
Tue 3/259:30 amSOU - LAX
2 stops20h 33mAer Lingus
Deal found 2/18$951
This KLM deal was found by Cheapflights users on 2/20. 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.
Sat 4/51:50 pmLAX - SOU
1 stop34h 55mKLM
Sat 4/126:05 pmSOU - LAX
1 stop28h 45mKLM
Deal found 2/20$965
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Sat 4/55:30 amLAX - SOU
3 stops26h 35mMultiple Airlines
Sat 4/126:55 pmSOU - LAX
3 stops33h 10mMultiple Airlines
Deal found 2/20$1,077
This British Airways deal was found by Cheapflights users on 2/20. 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.
Tue 3/186:55 pmLAX - SOU
2 stops17h 15mBritish Airways
Sun 3/239:30 amSOU - LAX
1 stop17h 00mBritish Airways
Deal found 2/20$1,456

Find flights from Riverside to Portsmouth within your budget

Customize your flight search to find flights from Riverside to Portsmouth 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 February 20, 2025.

Fly from

Riverside

Fly to

Portsmouth

Route

Depart

Return

Price

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Tue 3/18

2:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Tue 3/25

9:00 am-10:50 pm

2 stops20h 50m

$764

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Mon 3/17

12:31 am-8:45 am

2 stops25h 14m

Southampton Eastleigh

Tue 3/25

9:30 am-11:03 pm

2 stops20h 33m

$951

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sat 4/5

1:50 pm-8:45 am

1 stop34h 55m

Southampton Eastleigh

Sat 4/12

6:05 pm-2:50 pm

1 stop28h 45m

$965

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sat 4/5

5:30 am-4:05 pm

3 stops26h 35m

Southampton Eastleigh

Sat 4/12

6:55 pm-8:05 pm

3 stops33h 10m

$1,077

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Tue 3/18

6:55 pm-7:10 pm

2 stops17h 15m

Southampton Eastleigh

Sun 3/23

9:30 am-7:30 pm

1 stop17h 00m

$1,456

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 4/2

9:35 pm-8:25 am

3 stops50h 50m

$292

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 4/2

1:50 pm-5:00 pm

1 stop19h 10m

$497

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 3/30

1:15 pm-5:00 pm

2 stops19h 45m

$499

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Mon 3/31

1:50 pm-8:45 am

1 stop34h 55m

$505

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 5/28

12:55 am-3:35 pm

2 stops30h 40m

$821

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Best time to book a flight from Riverside to Portsmouth

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

Travel insights for flights from Riverside to Portsmouth

Get recent, data-driven insights about flights from Riverside to Portsmouth including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Riverside to Portsmouth (average of $661). Flying from Riverside to Portsmouth in June is currently the most expensive (average of $1,136). 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 P0R?

Find hourly flight availability from Riverside to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

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

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

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

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

Weekly flight availability from Riverside to Portsmouth

Explore weekly flight availability from Riverside to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 20, 2025.

The most flights from R1V to P0R are scheduled on a Thursday (56 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in Portsmouth by month

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

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

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

If weather is an important factor for your trip to Portsmouth, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated February 20, 2025.
Read reviews from past customers who have flown Delta, KLM and Virgin Atlantic from Riverside to Portsmouth. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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.

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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.

Aer Lingus
7.0
Good
1,070 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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.

British Airways
6.6
Okay
6,763 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Boarding

8.2

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 Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    The cheapest airlines for a one-way flight from Riverside to Portsmouth are Virgin Atlantic ($497), Delta ($499), and KLM ($505).

  • What are the most reliable airlines from Riverside to Portsmouth?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Riverside to Portsmouth on time: Singapore Airlines (92%), Air Canada (90%), Austrian Airlines (90%).

  • What are the cheapest flights from Riverside to Portsmouth?

    On average you can expect to pay $1,508 for a flight from Riverside to Portsmouth. The cheapest flight overall is $372 while the most popular route, (Los Angeles - Southampton Eastleigh) is currently priced at $780.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Riverside to Portsmouth (average of $661). Flying from Riverside to Portsmouth in June is currently the most expensive (average of $1,136). 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 Portsmouth

Discover the top 10 airlines that operate flights from Riverside to Portsmouth. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$871FlexibilityNo cancel feeOn-time60%
Norse Atlantic UKCheapest$378Average$687FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$419Average$599FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$425Average$881FlexibilityNo cancel feeOn-time72%
KLMCheapest$463Average$909FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$467Average$646FlexibilityNo cancel feeOn-time77%
DeltaCheapest$473Average$863FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$495Average$833FlexibilityNo cancel feeOn-time76%
FinnairCheapest$556Average$801FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$558Average$1,055FlexibilityNo cancel feeOn-timeN/A
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