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Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £456

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
3 May — 10 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to O'Hare Intl
Explore the most affordable flight options available from Portsmouth to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 April 2026.

Fri 15/509:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Fri 22/515:45
ORD
-
SOU
1 stop19h 05m
Aer Lingus
Deal found 31/3£641
Sun 17/509:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Sun 24/521:00
ORD
-
SOU
1 stop13h 50m
Aer Lingus
Deal found 2/4£675
Thu 8/1009:20
SOU
-
ORD
2 stops30h 20m
Multiple Airlines
Tue 13/1011:25
ORD
-
SOU
2 stops26h 05m
Multiple Airlines
Deal found 2/4£677
Fri 1/517:20
SOU
-
ORD
1 stop26h 55m
KLM
Fri 8/511:09
ORD
-
SOU
2 stops15h 36m
KLM
Deal found 3/4£721
Sat 16/509:20
SOU
-
ORD
2 stops16h 20m
Multiple Airlines
Sat 23/509:25
ORD
-
SOU
3 stops25h 25m
Multiple Airlines
Deal found 1/4£747
Fri 1/517:20
SOU
-
ORD
2 stops28h 58m
Virgin Atlantic
Fri 8/511:09
ORD
-
SOU
2 stops15h 36m
Virgin Atlantic
Deal found 3/4£748
Fri 1/509:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Fri 8/521:00
ORD
-
SOU
1 stop16h 30m
Aer Lingus
Deal found 3/4£774
Thu 8/1017:20
SOU
-
ORD
1 stop26h 55m
KLM
Tue 13/1010:40
ORD
-
SOU
2 stops15h 55m
KLM
Deal found 2/4£777
Fri 15/509:05
SOU
-
ORD
1 stop11h 10m
Virgin Atlantic
Fri 22/514:00
ORD
-
SOU
2 stops20h 50m
Virgin Atlantic
Deal found 31/3£787
Fri 15/509:20
SOU
-
ORD
2 stops30h 47m
Multiple Airlines
Fri 22/515:33
ORD
-
SOU
2 stops19h 17m
Multiple Airlines
Deal found 31/3£793

Find flight deals from Portsmouth to O'Hare Intl

Keep the following information in mind while searching for Portsmouth to O'Hare Intl flight deals. Data was last updated 3 April 2026.

Round-trip from

£641

One-way from

£456

Popular in

July

Cheapest in

September

Average price

£530
Aer Lingus
  • Aer Lingus
  • 15/5-22/5
  • 2 total stops
  • 35h 00m total
  • Portsmouth to Chicago
Search Deals
21/7
  • 21/7
  • 3 total stops
  • 45h 05m total
  • Portsmouth to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to O'Hare Intl 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 858,174 searches. Data last updated 3 April 2026.
Use the filters below to find and compare flights from Portsmouth to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 15/5

09:20-19:15

1 stop15h 55m

Chicago O'Hare Intl

Fri 22/5

15:45-16:50

1 stop19h 05m

£641

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 1/5

17:20-16:18

2 stops28h 58m

Chicago O'Hare Intl

Fri 8/5

11:09-08:45

2 stops15h 36m

£748

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 30/6

17:20-17:49

2 stops30h 29m

Chicago O'Hare Intl

Thu 30/7

09:45-08:45

2 stops17h 00m

£797

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 1/5

09:20-21:12

3 stops41h 52m

Chicago O'Hare Intl

Fri 8/5

05:05-19:30

3 stops32h 25m

£813

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 2/7

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Thu 30/7

13:44-17:35

2 stops21h 51m

£822

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 2/7

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Mon 3/8

11:30-08:45

2 stops15h 15m

£822

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 30/6

17:20-17:49

2 stops30h 29m

Chicago O'Hare Intl

Sun 2/8

13:44-17:35

2 stops21h 51m

£826

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 30/6

20:00-11:30

1 stop21h 30m

Chicago O'Hare Intl

Mon 3/8

22:35-16:50

1 stop12h 15m

£849
Fastest return journey

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 1/7

09:20-19:15

1 stop15h 55m

Chicago O'Hare Intl

Wed 29/7

22:35-16:50

1 stop12h 15m

£865

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 1/7

09:20-19:15

1 stop15h 55m

Chicago O'Hare Intl

Tue 28/7

22:35-16:50

1 stop12h 15m

£865

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Portsmouth to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Portsmouth with our price prediction graph.
Estimated return 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 Portsmouth to Chicago O'Hare Intl Airport

What is the cheapest month to book a flight from Portsmouth to Chicago O'Hare Intl Airport?

Currently, December is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £222). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £498). 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 P0R to ORD?

Find hourly flight availability from Portsmouth to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Chicago O'Hare Intl Airport as you normally would.

Weekly flight availability from Portsmouth to Chicago O'Hare Intl Airport

Explore weekly flight availability from Portsmouth to O'Hare Intl. 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 3 April 2026.

The most flights from P0R to ORD are scheduled on a Friday (52 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (27 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portsmouth to Chicago O'Hare Intl Airport?

    Aer Lingus, Virgin Atlantic, and Delta can get you from Portsmouth to Chicago O'Hare Intl Airport in just under 15h 55m. Your travel time can differ by up to 14h 34m. The distance from Portsmouth to Chicago O'Hare Intl Airport is about 3921 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Portsmouth to Chicago O'Hare Intl Airport?

    No one likes to see their flight delayed. When booking a flight from Portsmouth to Chicago O'Hare Intl Airport consider choosing Air Canada (89%), Austrian Airlines (89%) or United Airlines (89%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portsmouth to Chicago O'Hare Intl Airport?

    On average you can expect to pay £1,035 for a flight from Portsmouth to Chicago O'Hare Intl Airport. The cheapest flight overall is £413 while the most popular route, (Southampton Eastleigh - Chicago O'Hare Intl) is currently priced at £675.

  • Can I find deals for flights from Portsmouth to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Portsmouth to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to O'Hare Intl?

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

  • Can I find deals for business class flights from Portsmouth to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Portsmouth to O'Hare Intl 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 Portsmouth to Chicago O'Hare Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £222). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £498). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village

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Top 10 airlines flying from Portsmouth to O'Hare Intl

Discover the top 10 airlines that operate flights from Portsmouth to O'Hare Intl. 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 858,174 searches. Data last updated 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£347Average£493FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£350Average£537FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£369Average£643FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£376Average£518FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£381Average£520FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£400Average£565FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£402Average£597FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£403Average£610FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£410Average£636FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£418Average£599FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to O'Hare Intl?

When you search for this flight from Portsmouth to O'Hare Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to O'Hare Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Portsmouth to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Portsmouth to O'Hare Intl with no change fees?

Need flexible booking options for your flight to O'Hare Intl from Portsmouth? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to O'Hare Intl become cheaper?

Yes, Cheapflights offers price alerts on Portsmouth to O'Hare Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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