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Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £639

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
3 Dec — 10 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 November 2025.

Thu 18/1209:30SOU - ORD
1 stop14h 25mAer Lingus
Thu 25/1215:50ORD - SOU
1 stop10h 55mAer Lingus
Deal found 3/11£639
Thu 6/1120:10SOU - ORD
1 stop23h 50mAer Lingus
Thu 13/1119:40ORD - SOU
1 stop31h 05mAer Lingus
Deal found 1/11£687
Thu 18/1209:30SOU - ORD
1 stop14h 25mMultiple Airlines
Thu 25/1215:50ORD - SOU
2 stops35h 00mMultiple Airlines
Deal found 3/11£690
Thu 6/1114:35SOU - ORD
2 stops29h 25mMultiple Airlines
Thu 13/1119:40ORD - SOU
2 stops31h 10mMultiple Airlines
Deal found 1/11£845
Fri 21/1109:30SOU - ORD
1 stop14h 25mBritish Airways
Sun 23/1115:50ORD - SOU
1 stop10h 55mBritish Airways
Deal found 2/11£857

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 3 November 2025.

Round-trip from

£663

Popular in

July

Cheapest in

February

Average price

£490
Virgin Atlantic
  • Virgin Atlantic
  • 5/3-9/3
  • 3 total stops
  • 54h 45m total
  • Portsmouth to Chicago
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£62 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 November 2025
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 November 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 18/12

09:30-17:55

1 stop14h 25m

Chicago O'Hare Intl

Thu 25/12

15:50-08:45

1 stop10h 55m

£639

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

£663

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 18/12

09:30-17:55

1 stop14h 25m

Chicago O'Hare Intl

Thu 25/12

15:50-08:50

2 stops35h 00m

£690

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 17/3

12:25-18:55

1 stop11h 30m

Chicago O'Hare Intl

Tue 24/3

16:45-15:35

1 stop17h 50m

£720

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 17/11

09:30-17:55

1 stop14h 25m

£683

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 16/11

20:10-14:00

1 stop23h 50m

£688

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 23/11

20:10-17:55

1 stop27h 45m

£689

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 21/11

09:30-17:55

1 stop14h 25m

£725

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 27/12

09:30-17:55

1 stop14h 25m

£728

Flights are sorted by cheapest return flights first.

Deals found on 1/11

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, March is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £307). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £512). 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 November 2025.

It’s typically best to fly out from Portsmouth to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 1% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 Thursday afternoons when fares are most often at their lowest. Saturday afternoons 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 3 November 2025.

The most flights from P0R to ORD are scheduled on a Sunday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 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 and Virgin Atlantic can get you from Portsmouth to Chicago O'Hare Intl Airport in just under 14h 25m. Your travel time can differ by up to 11h 50m. 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 (84%), Austrian Airlines (84%) or United Airlines (84%) 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 £1,268 for a flight from Portsmouth to Chicago O'Hare Intl Airport. The cheapest flight overall is £370 while the most popular route, (Southampton Eastleigh - Chicago O'Hare Intl) is currently priced at £582.

  • 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, March is the cheapest month in which you can book a flight from Portsmouth to Chicago O'Hare Intl Airport (average of £307). Flying from Portsmouth to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £512). 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

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Alternative routes for Portsmouth to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Gatwick to Midway flights
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Manchester to Midway flights
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London City to Midway flights
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Edinburgh to Midway flights
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Newcastle upon Tyne to O'Hare Intl flights
Leeds to Midway flights
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Bristol to Midway flights
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Newquay to O'Hare Intl flights
Southampton to Midway flights
Liverpool to O'Hare Intl flights
Darlington to Midway flights
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Doncaster to O'Hare Intl flights

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 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£320Average£497FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£352Average£540FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£367Average£490FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£376Average£623FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£377Average£601FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest£394Average£551FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£404Average£587FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£412Average£579FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£412Average£614FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£417Average£552FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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