Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £497

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 17 September 2025.

Round-trip from

£497

Popular in

July

Cheapest in

February

Average price

£435
KLM
  • KLM
  • 30/10-6/11
  • 3 total stops
  • 39h 12m total
  • Portsmouth to Chicago
Highest demand for flights based on searches. 14% potential increase in price (£61 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Portsmouth to O'Hare Intl

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 17 September 2025.

Thu 30/1018:05SOU - ORD
1 stop26h 15mKLM
Thu 6/1113:08ORD - SOU
2 stops12h 57mKLM
Deal found 15/9£497
Fri 31/1017:30SOU - ORD
1 stop26h 50mKLM
Fri 7/1116:25ORD - SOU
1 stop10h 25mKLM
Deal found 16/9£499
Thu 30/1020:10SOU - ORD
2 stops29h 55mMultiple Airlines
Thu 6/1118:50ORD - SOU
3 stops35h 05mMultiple Airlines
Deal found 15/9£585
Fri 31/1014:25SOU - ORD
2 stops32h 20mMultiple Airlines
Fri 7/1119:20ORD - SOU
3 stops31h 25mMultiple Airlines
Deal found 16/9£757
Sat 27/1209:30SOU - ORD
1 stop14h 25mBritish Airways
Sat 17/121:00ORD - SOU
1 stop12h 35mBritish Airways
Deal found 16/9£847
Tue 30/919:55SOU - ORD
2 stops21h 55mBritish Airways
Tue 7/1015:45ORD - SOU
1 stop10h 20mBritish Airways
Deal found 16/9£893

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 17 September 2025.
Use the filters below to find and compare flights from Portsmouth to Chicago O'Hare Intl Airport that are best for you.

Fly from

Portsmouth

Fly to

O'Hare Intl

Route

Depart

Return

Price

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 30/10

18:05-15:20

1 stop26h 15m

Chicago O'Hare Intl

Thu 6/11

13:08-08:05

2 stops12h 57m

£497

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 31/10

17:30-15:20

1 stop26h 50m

Chicago O'Hare Intl

Fri 7/11

16:25-08:50

1 stop10h 25m

£499

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 5/3

18:05-14:20

1 stop26h 15m

Chicago O'Hare Intl

Mon 9/3

17:25-17:00

1 stop18h 35m

£533

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 22/12

12:05-17:55

2 stops35h 50m

£576

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 23/12

15:20-06:25

3 stops45h 05m

£658

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 5/10

20:00-19:29

2 stops29h 29m

£706

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 30/9

20:00-19:00

1 stop29h 00m

£710

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 1/10

08:40-18:15

2 stops15h 35m

£724

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 2/10

09:40-19:24

2 stops15h 44m

£740

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 4/10

09:40-16:05

2 stops36h 25m

£740

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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, January is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £595). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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 17 September 2025.

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.

What is the cheapest day to fly from Portsmouth to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly return from Portsmouth to O'Hare Intl. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to Chicago O'Hare Intl Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 17 September 2025.

The most flights from P0R to ORD are scheduled on a Tuesday (53 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (42 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?

    KLM and Virgin Atlantic can get you from Portsmouth to Chicago O'Hare Intl Airport in just under 26h 15m. 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 Malaysia Airlines (79%), Air Canada (76%) or Austrian Airlines (76%) 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 £799 for a flight from Portsmouth to Chicago O'Hare Intl Airport. The cheapest flight overall is £408 while the most popular route, (Southampton Eastleigh - Chicago O'Hare Intl) is currently priced at £499.

  • 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, January is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £595). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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
Downers Grove
Elk Grove Village
Rosemont

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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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£307Average£478FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£349Average£477FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£363Average£606FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£363Average£566FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£375Average£475FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£388Average£544FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£390Average£568FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£395Average£564FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£399Average£553FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£403Average£535FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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