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Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £503

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
6 Aug — 13 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 7 July 2026.

Fri 14/809:20
SOU
-
ORD
2 stops16h 26m
Multiple Airlines
Mon 24/812:11
ORD
-
SOU
2 stops25h 19m
Multiple Airlines
Deal found 6/7£754
Mon 2/1109:20
SOU
-
ORD
1 stop15h 05m
British Airways
Thu 19/1115:55
ORD
-
SOU
1 stop18h 40m
British Airways
Deal found 4/7£762
Thu 26/1109:20
SOU
-
ORD
2 stops33h 07m
British Airways
Mon 30/1115:55
ORD
-
SOU
1 stop10h 45m
British Airways
Deal found 2/7£818
Fri 14/809:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Mon 24/815:45
ORD
-
SOU
1 stop21h 45m
Aer Lingus
Deal found 6/7£864
Thu 3/920:00
SOU
-
ORD
1 stop21h 30m
British Airways
Mon 7/922:20
ORD
-
SOU
1 stop15h 10m
British Airways
Deal found 6/7£874

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 7 July 2026.

Round-trip from

£754

One-way from

£503

Popular in

July

Cheapest in

February

Average price

£695
14/8-24/8
  • 14/8-24/8
  • 4 total stops
  • 41h 45m total
  • Portsmouth to Chicago
Search Deals
British Airways
  • British Airways
  • 24/9
  • 1 total stop
  • 24h 00m total
  • Portsmouth to Chicago
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£78 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 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 7 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
Fastest return journey

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 2/11

09:20-18:25

1 stop15h 05m

Chicago O'Hare Intl

Thu 19/11

15:55-16:35

1 stop18h 40m

£762

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 26/11

09:20-12:27

2 stops33h 07m

Chicago O'Hare Intl

Mon 30/11

15:55-08:40

1 stop10h 45m

£818

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 3/9

20:00-11:30

1 stop21h 30m

Chicago O'Hare Intl

Mon 7/9

21:15-20:55

2 stops17h 40m

£884

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 11/8

17:20-14:00

1 stop26h 40m

Chicago O'Hare Intl

Tue 25/8

11:01-08:05

2 stops15h 04m

£921
Cheapest one-way

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 24/9

20:00-14:00

1 stop24h 00m

£503

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 6/8

19:55-19:52

3 stops29h 57m

£522
Fastest single journey

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 20/8

20:00-11:30

1 stop21h 30m

£855

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 21/8

20:00-11:30

1 stop21h 30m

£855

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 22/8

09:20-11:30

1 stop32h 10m

£864

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 11/8

20:00-11:30

1 stop21h 30m

£1,154

Flights are sorted by cheapest return flights first.

Deals found on 3/7

Showing 1-10 of 12 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 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 7 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 7 July 2026.

The most flights from P0R to ORD are scheduled on a Monday (52 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (44 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?

    British Airways can get you from Portsmouth to Chicago O'Hare Intl Airport in just under 15h 05m. 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 £1,649 for a flight from Portsmouth to Chicago O'Hare Intl Airport. The cheapest flight overall is £369 while the most popular route, (Southampton Eastleigh - Chicago O'Hare Intl) is currently priced at £727.

  • 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

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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 7 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£304Average£532FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£351Average£494FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£366Average£665FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£377Average£533FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£389Average£533FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£397Average£619FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£415Average£656FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£419Average£631FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£430Average£682FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£432Average£666FlexibilityNo 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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