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Cheap Flights from Chicago to Harmondsworth

Compare Chicago to Harmondsworth flight deals

Find the cheapest month or even day of the year to fly to Harmondsworth

Book the best Harmondsworth fare with no extra fees

Flight deals from Chicago to Harmondsworth

Looking for a cheap last-minute deal or the best return flight from Chicago to Harmondsworth? Find the lowest prices on one-way and return tickets right here.
London.$981 per passenger.Departing Sun, 22 Mar, returning Tue, 31 Mar.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Sun, 22 Mar, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Tue, 31 Mar, arriving in Chicago O'Hare International.Price includes taxes and charges.From $981, select.
London.$996 per passenger.Departing Wed, 6 May, returning Thu, 14 May.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Wed, 6 May, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Thu, 14 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From $996, select.
London.$999 per passenger.Departing Wed, 22 Apr, returning Tue, 28 Apr.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Wed, 22 Apr, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Tue, 28 Apr, arriving in Chicago O'Hare International.Price includes taxes and charges.From $999, select.
London.$1,003 per passenger.Departing Wed, 29 Apr, returning Wed, 6 May.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Wed, 29 Apr, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Wed, 6 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,003, select.
London.$1,004 per passenger.Departing Tue, 3 Nov, returning Mon, 9 Nov.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Tue, 3 Nov, arriving in London Heathrow.Inbound indirect flight with Icelandair, departs from London Heathrow on Mon, 9 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,004, select.
London.$1,010 per passenger.Departing Sun, 22 Mar, returning Wed, 15 Apr.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Sun, 22 Mar, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Wed, 15 Apr, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,010, select.
London.$1,013 per passenger.Departing Fri, 27 Nov, returning Wed, 2 Dec.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Fri, 27 Nov, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Wed, 2 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,013, select.
London.$1,017 per passenger.Departing Thu, 4 Feb, returning Thu, 18 Feb.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Thu, 4 Feb, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Thu, 18 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,017, select.
London.$1,017 per passenger.Departing Mon, 18 Jan, returning Mon, 1 Feb.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 18 Jan, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Mon, 1 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,017, select.
London.$1,023 per passenger.Departing Thu, 29 Oct, returning Thu, 26 Nov.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Thu, 29 Oct, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Thu, 26 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,023, select.
London.$1,038 per passenger.Departing Fri, 4 Dec, returning Tue, 8 Dec.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Fri, 4 Dec, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Tue, 8 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,038, select.
London.$1,053 per passenger.Departing Mon, 11 Jan, returning Mon, 18 Jan.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 11 Jan, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Mon, 18 Jan, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,053, select.
London.$1,095 per passenger.Departing Mon, 30 Mar, returning Fri, 1 May.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 30 Mar, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Fri, 1 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,095, select.
London.$1,115 per passenger.Departing Mon, 20 Jul, returning Sun, 23 Aug.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Mon, 20 Jul, arriving in London Heathrow.Inbound indirect flight with Icelandair, departs from London Heathrow on Sun, 23 Aug, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,115, select.
London.$1,116 per passenger.Departing Mon, 14 Sep, returning Tue, 22 Sep.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Chicago O'Hare International on Mon, 14 Sep, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Tue, 22 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,116, select.
London.$1,116 per passenger.Departing Wed, 13 May, returning Sat, 22 Aug.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Wed, 13 May, arriving in London Heathrow.Inbound indirect flight with Icelandair, departs from London Heathrow on Sat, 22 Aug, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,116, select.

Chicago to Harmondsworth: Flight information

The things to know before you go.
Fly intoLondon Heathrow Airport
Distance to Harmondsworth2.5 km
Cheapest flight$981
Cheapest month to flyMarch
Most popular airlineAmerican Airlines
Average flight time7 hrs, 55 mins

Find the cheapest month to fly from Chicago to Harmondsworth

We always keep an eye on fares, so you can find the best flight deal in seconds. It looks like Chicago to Harmondsworth flights are currently cheapest in March. We’ve based this on flights into London Heathrow Airport.
Mar
from $981
Apr
from $999
May
from $996
Jun
from $1,434
Jul
from $1,315
Aug
from $1,134
Sep
from $1,116
Oct
from $1,126
Nov
from $1,004
Dec
from $1,038
Jan
from $1,053
Feb
from $1,017

Finding cheap flights from Chicago to Harmondsworth: Frequently asked questions

There are 3 airports near Harmondsworth: London Heathrow Airport, London City Airport and London Gatwick Airport.
The best price we found for a return flight from Chicago to Harmondsworth is $981. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
American Airlines, Iberia, British Airways all offer direct flights to London Heathrow Airport.
We've checked every Chicago to Harmondsworth fare we could find, and the cheapest upcoming date to fly seems to be on Sunday, 22 March 2026. Overall, the cheapest month to fly from Chicago to Harmondsworth is usually March.
If you're flying from Chicago, the cheapest airport near Harmondsworth is London Heathrow – which is 2.5 km away from the centre of Harmondsworth. We've found flights into this airport from $981.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Harmondsworth on Sunday, 22 March 2026.
No airlines currently offer direct flights between Chicago and Harmondsworth. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Harmondsworth but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Harmondsworth is around 40 days in advance, so don’t leave your flight to the last minute.
London Heathrow Airport is 2.5km from Harmondsworth, London City Airport is 36.3km from Harmondsworth, and London Gatwick Airport is 42.6km from Harmondsworth.
London Heathrow Airport is closest to Harmondsworth, at around 2.5 km away.
The cheapest airline that flies to Harmondsworth is TAP Air Portugal. And the cheapest airline that flies to London City Airport is Finnair.