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Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £453

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
19 Aug — 26 Aug1
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 20 July 2026.

Sun 6/917:20
SOU
-
ORD
1 stop27h 10m
Delta
Sun 13/916:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 15/7£740
Sun 11/1017:20
SOU
-
ORD
1 stop27h 10m
Delta
Mon 19/1009:59
ORD
-
SOU
2 stops16h 36m
Delta
Deal found 19/7£769
Sat 5/909:15
SOU
-
ORD
1 stop11h 00m
Delta
Sun 13/916:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 15/7£769
Sat 5/917:20
SOU
-
ORD
2 stops29h 31m
Delta
Sat 12/918:24
ORD
-
SOU
2 stops32h 11m
Delta
Deal found 15/7£773
Sat 10/1009:20
SOU
-
ORD
1 stop10h 55m
Delta
Tue 20/1016:20
ORD
-
SOU
1 stop10h 25m
Delta
Deal found 19/7£798
Wed 12/817:20
SOU
-
ORD
1 stop26h 40m
Aer Lingus
Wed 19/815:45
ORD
-
SOU
1 stop19h 05m
Aer Lingus
Deal found 15/7£801
Sat 22/809:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Sat 29/815:45
ORD
-
SOU
1 stop10h 50m
Aer Lingus
Deal found 18/7£805
Sat 15/817:20
SOU
-
ORD
1 stop26h 40m
Aer Lingus
Sat 22/821:00
ORD
-
SOU
1 stop16h 30m
Aer Lingus
Deal found 18/7£823
Sat 10/1009:20
SOU
-
ORD
1 stop10h 55m
Delta
Fri 23/1016:20
ORD
-
SOU
1 stop10h 25m
Delta
Deal found 19/7£828
Sun 11/1017:20
SOU
-
ORD
1 stop27h 10m
Delta
Sat 24/1016:20
ORD
-
SOU
1 stop11h 35m
Delta
Deal found 19/7£858
Thu 3/920:00
SOU
-
ORD
1 stop21h 30m
British Airways
Mon 7/922:20
ORD
-
SOU
1 stop15h 10m
British Airways
Deal found 14/7£869

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 20 July 2026.

Round-trip from

£740

One-way from

£453

Popular in

July

Cheapest in

February

Average price

£715
Delta
  • Delta
  • 6/9-13/9
  • 2 total stops
  • 37h 25m total
  • Portsmouth to Chicago
Search Deals
British Airways
  • British Airways
  • 30/9
  • 1 total stop
  • 15h 55m total
  • Portsmouth to Chicago
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£81 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 20 July 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

Sun 6/9

17:20-14:30

1 stop27h 10m

Chicago O'Hare Intl

Sun 13/9

16:20-08:35

1 stop10h 15m

£740

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 6/9

17:20-14:30

1 stop27h 10m

Chicago O'Hare Intl

Sat 12/9

18:24-08:35

2 stops32h 11m

£743

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 12/10

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Mon 19/10

10:30-08:35

2 stops16h 05m

£769

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 12/10

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Tue 20/10

16:20-08:45

1 stop10h 25m

£769

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 5/9

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Sat 12/9

16:20-08:45

1 stop10h 25m

£769
Fastest return journey

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 15/10

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Fri 23/10

16:20-08:45

1 stop10h 25m

£828

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 3/9

06:50-15:55

2 stops15h 05m

Chicago O'Hare Intl

Mon 7/9

21:15-19:25

2 stops16h 10m

£908

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 12/10

09:20-19:15

1 stop15h 55m

Chicago O'Hare Intl

Sun 25/10

16:55-08:40

1 stop10h 45m

£922

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 22/8

20:00-11:30

1 stop21h 30m

Chicago O'Hare Intl

Mon 31/8

15:45-08:40

1 stop10h 55m

£950

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 21/8

20:00-11:30

1 stop21h 30m

Chicago O'Hare Intl

Thu 27/8

15:45-08:40

1 stop10h 55m

£974

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 21 resultsSorted by cheapest first
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2
3

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 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 20 July 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 20 July 2026.

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

    Delta can get you from Portsmouth to Chicago O'Hare Intl Airport in just under 27h 10m. Your travel time can differ by up to . The distance from Portsmouth to Chicago O'Hare Intl Airport is about 3921 mi.

  • 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 (90%), Austrian Airlines (90%) or United Airlines (90%) 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 £1,636 for a flight from Portsmouth to Chicago O'Hare Intl Airport. The cheapest flight overall is £379 while the most popular route, (Southampton Eastleigh - Chicago O'Hare Intl) is currently priced at £769.

  • 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.

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

Browse thousands of different options on Cheapflights for your next trip

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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 20 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£302Average£529FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£348Average£491FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£363Average£670FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£375Average£529FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£386Average£548FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£394Average£614FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£411Average£660FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£416Average£628FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£429Average£684FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£430Average£692FlexibilityNo cancel feeOn-time76%
Search Finnair 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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