Flights
Insights
FAQs

Finnair flights from London Heathrow Airport to Chicago (LHR - CHI)

LHR — CHI
25 Jun — 2 Jul1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from London to Chicago on Finnair typically fly into Chicago O'Hare Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from Heathrow to Chicago in 2026

Find detailed information about Finnair flights from Heathrow to Chicago. Explore the options provided by Finnair to plan your journey from Heathrow to Chicago. Data last updated 26 May 2026.

One-way from

£433

Return from

£582

Popular in

July

Cheapest in

September

Average price (all airlines)

£597
Finnair
  • Finnair
  • 18/9
  • Nonstop
  • 8h 45m total
  • London to Chicago
Search Deals
Finnair
  • Finnair
  • 12/9-20/9
  • 3 total stops
  • 48h 50m total
  • London to Chicago
Search Deals
Highest demand for flights from London Heathrow to Chicago; 9% potential price increase.
Search Deals
Best time to find cheap flights from London Heathrow to Chicago; 1% potential price drop.
Search Deals
Average price for all London Heathrow to Chicago flights (one-way and round-trip).
Search Deals

  • Can I get a flight from London Heathrow Airport to Chicago on Finnair for under £667?

    Cheapflights currently has 10 LHR-CHI flights for under £667. Flights to Chicago will vary based on many factors, like date and time. Click here to find the best price for your dates on Cheapflights.

Find Finnair flight deals from Heathrow to Chicago

Enter your travel dates to find the best prices.

Cheapest Finnair flights from Heathrow to Chicago
Explore the most affordable Finnair flight options available from Heathrow to Chicago. Find the lowest fares with prices last updated on 26 May 2026.

Tue 30/618:05
LHR
-
ORD
1 stop26h 05m
Finnair
Tue 14/722:30
ORD
-
LHR
Nonstop7h 45m
Finnair
Deal found 23/5£642
Tue 23/612:15
LHR
-
ORD
Nonstop8h 45m
Finnair
Tue 30/613:24
ORD
-
LHR
1 stop14h 16m
Finnair
Deal found 26/5£645
Mon 22/614:10
LHR
-
ORD
2 stops22h 48m
Finnair
Tue 30/613:24
ORD
-
LHR
1 stop14h 16m
Finnair
Deal found 23/5£646

Which month is the cheapest to fly Economy class from London Heathrow Airport to Chicago?

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

Weekly Finnair flight availability from London Heathrow Airport to Chicago

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

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago 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 when rainfall is around 43.0 mm.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, 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 Heathrow to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow 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.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 26 May 2026.
Finnair
7.7
Good
1,399 reviews
Check prices
Overview

Crew

8.2

Entertainment

6.9

Food

6.7

Boarding

7.7

Comfort

7.5

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.