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Portsmouth

$338+ Cheap flights from Irvine, 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
1 adult, Economy
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Cheap flight deals from Irvine to Portsmouth

Keep the following information in mind while searching for Irvine to Portsmouth flight deals. Data was last updated April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$852
(Mytrip)

One-way from

$338
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$864
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 Irvine to Portsmouth
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One-way flight from Irvine to Portsmouth
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Highest demand for flights based on searches. 12% potential increase in price ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Irvine to Portsmouth

Cheapest flights from Irvine to Portsmouth
Explore the most affordable flight options available from Irvine to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

This Delta deal was found by Cheapflights users on 4/2. 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 8/54:50 pmLAX - SOU
1 stop16h 10mDelta
Tue 8/199:20 amSOU - LAX
1 stop13h 30mDelta
Deal found 4/2$778
This KLM deal was found by Cheapflights users on 4/3. 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.
Wed 5/71:50 pmLAX - SOU
1 stop34h 55mKLM
Thu 5/229:20 amSOU - LAX
1 stop13h 30mKLM
Deal found 4/3$798
This Virgin Atlantic deal was found by Cheapflights users on 4/4. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:50 pmLAX - SOU
1 stop16h 10mVirgin Atlantic
Wed 10/89:20 amSOU - LAX
1 stop13h 30mVirgin Atlantic
Deal found 4/4$830
This Cheapflightsfares deal was found by Cheapflights users on 4/3. 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.
Sat 9/2011:59 pmLAX - SOU
2 stops25h 11mAer Lingus
Tue 9/309:10 amSOU - LAX
2 stops22h 02mAer Lingus
Deal found 4/3$931
This Mytrip deal was found by Cheapflights users on 4/3. 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.
Wed 5/78:05 amLAX - SOU
3 stops24h 30mMultiple Airlines
Thu 5/228:00 pmSOU - LAX
3 stops34h 59mMultiple Airlines
Deal found 4/3$1,178
This British Airways deal was found by Cheapflights users on 4/3. 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 4/165:05 pmLAX - SOU
2 stops18h 20mBritish Airways
Wed 4/239:10 amSOU - LAX
1 stop17h 15mBritish Airways
Deal found 4/3$2,273

Cheapflights Fare Finder

Customize your flight search to find flights from Irvine 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 April 4, 2025.
Use the filters below to find and compare flights from Irvine to Portsmouth that are best for you.

Fly from

Irvine

Fly to

Portsmouth

Route

Depart

Return

Price

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Tue 8/5

4:50 pm-5:00 pm

1 stop16h 10m

Southampton Eastleigh

Thu 8/21

9:20 am-2:50 pm

1 stop13h 30m

$778

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 5/7

1:50 pm-8:45 am

1 stop34h 55m

Southampton Eastleigh

Thu 5/22

9:20 am-2:50 pm

1 stop13h 30m

$798

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Fri 9/26

4:50 pm-5:00 pm

1 stop16h 10m

Southampton Eastleigh

Wed 10/8

9:20 am-2:50 pm

1 stop13h 30m

$830

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sat 9/20

11:59 pm-9:10 am

2 stops25h 11m

Southampton Eastleigh

Tue 9/30

9:10 am-11:12 pm

2 stops22h 02m

$931

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 5/7

12:05 pm-7:30 pm

2 stops23h 25m

Southampton Eastleigh

Thu 5/22

8:00 pm-11:43 pm

3 stops35h 43m

$1,170

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 4/16

5:05 pm-7:25 pm

2 stops18h 20m

Southampton Eastleigh

Wed 4/23

9:10 am-6:25 pm

1 stop17h 15m

$2,273

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sat 4/26

9:25 pm-8:15 am

2 stops50h 50m

$338

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 4/20

1:50 pm-8:50 am

1 stop35h 00m

$490

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 4/20

9:34 am-8:45 am

2 stops15h 11m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

Best time to book a flight from Irvine to Portsmouth

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

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

Currently, November is the cheapest month in which you can book a flight from Irvine to Portsmouth (average of $661). Flying from Irvine to Portsmouth in June is currently the most expensive (average of $1,110). 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 IR9 to P0R?

Find hourly flight availability from Irvine 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 April 4, 2025.

When flying from Irvine to Portsmouth, 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 Irvine to Portsmouth?

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

Travelers seeking maximum savings on their Irvine 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 Irvine to Portsmouth

Explore weekly flight availability from Irvine 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 April 4, 2025.

The most flights from IR9 to P0R are scheduled on a Wednesday (58 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 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 April 4, 2025.
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
1,323 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
1,059 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
6,718 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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 Irvine 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 most reliable airlines from Irvine to Portsmouth?

    Before booking your flight to Portsmouth from Irvine, check out the most reliable airlines to get you to your destination on time: KLM (91%), Air Canada (88%), Austrian Airlines( 88%).

  • What are the cheapest flights from Irvine to Portsmouth?

    While on average a flight from Irvine to Portsmouth is generally $3,212, our data shows the cheapest flight currently is $448. When looking at the most popular route, (Los Angeles - Southampton Eastleigh), you can expect to pay $782 for that flight.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Irvine to Portsmouth (average of $661). Flying from Irvine to Portsmouth in June is currently the most expensive (average of $1,110). 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 Irvine to Portsmouth

Discover the top 10 airlines that operate flights from Irvine 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$807FlexibilityNo cancel feeOn-time60%
Norse Atlantic UKCheapest$383Average$676FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$414Average$601FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$418Average$894FlexibilityNo cancel feeOn-time72%
Air FranceCheapest$447Average$646FlexibilityNo cancel feeOn-time77%
KLMCheapest$463Average$954FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$467Average$821FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$514Average$691FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$533Average$933FlexibilityNo cancel feeOn-time79%
DeltaCheapest$551Average$888FlexibilityNo cancel feeOn-timeN/A

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