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Finnair flights from London to Chicago O'Hare Intl Airport (LON - ORD)

LON — ORD
17 Jul — 24 Jul1
1 adult
1 adult, Economy, 0 bags

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Cheapest Finnair flights from London to O'Hare Intl
Explore the most affordable Finnair flight options available from London to O'Hare Intl. Find the lowest fares with prices last updated on 17 June 2026.

Tue 14/712:15
LHR
-
ORD
Nonstop8h 45m
Finnair
Sun 26/711:45
ORD
-
LHR
1 stop12h 35m
Finnair
Deal found 13/6£568
Wed 8/712:15
LHR
-
ORD
Nonstop8h 45m
Finnair
Wed 22/711:45
ORD
-
LHR
1 stop12h 30m
Finnair
Deal found 13/6£569
Wed 8/707:50
LHR
-
ORD
1 stop14h 10m
Finnair
Wed 15/711:45
ORD
-
LHR
1 stop16h 30m
Finnair
Deal found 13/6£570

  • How do most travelers feel about Finnair?

    Cheapflights users who travel with Finnair (a popular airline from London to Chicago O'Hare Intl Airport) have rated them a 7.7/10. This rating comes from 1,410 reviews. If you are looking to travel LON-ORD, search your dates above.

  • Can I get a flight from London to Chicago O'Hare Intl Airport on Finnair for under £745?

    7 Finnair flights from LON to ORD have recently been found on Cheapflights for under £745. Click here to find the best deals to Chicago O'Hare Intl Airport for your desired dates.

Finnair flights from London to O'Hare Intl in 2026

Find detailed information about Finnair flights from London to O'Hare Intl. Explore the options provided by Finnair to plan your journey from London to O'Hare Intl. Data last updated 17 June 2026.

One-way from

£447

Return from

£568

Popular in

July

Cheapest in

September

Average price (all airlines)

£729
Finnair
  • Finnair
  • 17/9
  • Nonstop
  • 9h 00m total
  • London to Chicago
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Finnair
  • Finnair
  • 14/7-26/7
  • 1 total stop
  • 21h 20m total
  • London to Chicago
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Highest demand for flights from London to Chicago O'Hare Intl; 16% potential price increase.
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Best time to find cheap flights from London to Chicago O'Hare Intl; 2% potential price drop.
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Average price for all London to Chicago O'Hare Intl flights (one-way and round-trip).
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Which month is the cheapest to fly Economy class from London to Chicago O'Hare Intl Airport?

For Economy class flights, the cheapest month to fly this route is November. The most expensive months are March and July.

Weekly Finnair flight availability from London to Chicago O'Hare Intl Airport

The most Finnair flights from LON to ORD are scheduled on a Monday (5 on average). You will have fewer Finnair flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

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.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

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).

Best time to book a flight from London to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from London 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.

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Fly from London to O'Hare Intl on another airline

Consider alternative airlines that service the O'Hare Intl area. Flight routes are based on user searches made on Cheapflights and were last updated on 17 June 2026.
British Airways flights from London to Chicago O'Hare Intl
Lufthansa flights from London to Chicago O'Hare Intl

See what others are saying about Finnair

Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 17 June 2026.
Finnair
7.7
Good
1,410 reviews
Check prices
Overview

Boarding

7.7

Entertainment

6.9

Crew

8.2

Comfort

7.4

Food

6.7

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