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 24h. Your travel time can differ by up to . The distance from Portsmouth to Chicago O'Hare Intl Airport is about 3921 mi.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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

On average you can expect to pay £2,945 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 £631.

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 (87%), Austrian Airlines (87%) or United Airlines (87%) as they are the most reliable in getting you off to your destination on time.

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.

£441+ Cheap Flights from Portsmouth to Chicago O'Hare Intl Airport

Cheap flight deals from Portsmouth to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 September 2026.

Thu 15/1009:20 -

1 stop15h 55m

Thu 22/1015:45 -

1 stop10h 55m

Deal found 31/8£584

Thu 24/920:00 -

1 stop24h 00m

Mon 28/915:45 -

1 stop10h 55m

Deal found 2/9£631

Thu 15/1020:00 -

2 stops22h 30m

Thu 22/1016:55 -

2 stops17h 55m

Deal found 31/8£638

Thu 15/1009:20 -

1 stop15h 55m

Mon 23/1115:55 -

1 stop10h 45m

Deal found 29/8£643

Sun 11/1020:00 -

1 stop24h 00m

Sun 18/1015:45 -

1 stop10h 55m

Deal found 31/8£648

Wed 14/1009:20 -

2 stops16h 10m

Wed 25/1115:55 -

1 stop10h 45m

Deal found 29/8£671

Find flight deals from Portsmouth to O'Hare Intl

Round-trip from	£584
One-way from	£441
Popular in	August
Cheapest in	February
Average price	£566

Aer Lingus
15/10-22/10
2 total stops
26h 50m total
Portsmouth to Chicago

Search Deals

30/12-31/12
2 total stops
27h 20m total
Portsmouth to Chicago

Search Deals

Highest demand for flights based on searches. 11% 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 September 2026

Search Deals

Cheapflights Fare Finder

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 Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Wed 30/12

09:20-16:45

3 stops37h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£443

Fastest return journey

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Wed 30/12

08:40-14:25

1 stop11h 45m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£469

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Mon 9/11

09:20-18:20

1 stop15h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£490

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Thu 5/11

09:20-13:01

2 stops33h 41m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£530

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Thu 24/9

20:00-14:00

1 stop24h 00m

Chicago O'Hare Intl

Mon 28/9

15:45-08:40

1 stop10h 55m

£631

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Thu 15/10

20:00-12:30

2 stops22h 30m

Chicago O'Hare Intl

Thu 22/10

16:55-16:50

2 stops17h 55m

£638

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Sun 11/10

20:00-14:00

1 stop24h 00m

Chicago O'Hare Intl

Sun 18/10

15:45-08:40

1 stop10h 55m

£648

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Sun 18/10

20:00-14:00

1 stop24h 00m

Chicago O'Hare Intl

Sat 21/11

20:05-16:35

1 stop14h 30m

£682

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Sat 24/10

17:20-15:10

1 stop27h 50m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£738

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Wed 7/10

09:20-19:30

2 stops16h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£809

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 14 resultsSorted by cheapest first

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.

SOU-ORD

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

P0R-ORD

SOU-ORD

What is the cheapest time of day to fly from P0R to ORD?

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

The most flights from P0R to ORD are scheduled on a Monday (49 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (49 on average).

Related info for your journey

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 24h. 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 (87%), Austrian Airlines (87%) or United Airlines (87%) 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 £2,945 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 £631.
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.

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Top 10 airlines flying from Portsmouth to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£328	Average£551	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£353	Average£506	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£381	Average£541	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
JetBlue	Cheapest£382	Average£679	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
TAP AIR PORTUGAL	Cheapest£385	Average£572	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£392	Average£639	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Lufthansa	Cheapest£403	Average£659	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£405	Average£680	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£421	Average£747	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£426	Average£702	FlexibilityNo cancel fee	On-time76%	Search Finnair 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?

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Cheap flights from Portsmouth to Chicago O'Hare Intl Airport from £441

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to O'Hare Intl

Cheapest flights from Portsmouth to O'Hare IntlExplore 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 September 2026.

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 September 2026.

Best flights from Portsmouth to O'Hare IntlDiscover carefully curated flight deals from Portsmouth to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 September 2026.

Discover carefully curated flight deals from Portsmouth to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 September 2026.

Last-minute flights from Portsmouth to O'Hare IntlDiscover last-minute flight deals from Portsmouth to O'Hare Intl. Data last updated 3 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to O'Hare Intl. Data last updated 3 September 2026 and is based on user searches.

One-way flights from Portsmouth to O'Hare IntlSearch for one-way flight options from Portsmouth to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 3 September 2026.

Search for one-way flight options from Portsmouth to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 3 September 2026.

Find flight deals from Portsmouth to O'Hare Intl

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

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.

Cheapflights Insights

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 September 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

The most flights from P0R to ORD are scheduled on a Monday (49 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (49 on average).

Related info for your journey

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

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

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

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

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

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

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

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Alternative routes for Portsmouth to O'Hare Intl

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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 September 2026.

Best flights from Portsmouth to O'Hare Intl
Discover carefully curated flight deals from Portsmouth to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 3 September 2026.

Last-minute flights from Portsmouth to O'Hare Intl
Discover last-minute flight deals from Portsmouth to O'Hare Intl. Data last updated 3 September 2026 and is based on user searches.

One-way flights from Portsmouth to O'Hare Intl
Search for one-way flight options from Portsmouth to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 3 September 2026.