Cheapest€52.65
- United Airlines UA438606:471h 12m07:59London YXUChicago MDW
Door to door 4h 22mCO2 137.3 kgChanges 0Fixed, no changes
London to Chicago flight
Flights from London to Chicago start at €68.58 and take 4h 21m at their fastest.
The Flights from London to Chicago starts at €68.58 and takes 4h 21m door to door, run by 2 operators over 558 km, with around 2 departures a day. Fares bottom out about 45 days before departure.
- 4h 21mDoor to door
- 1h 11mMoving
- €68.58From
- 137.3 kgCO2
The cheapest and the fastest on September 28, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€56.19
- SkyWest SW280206:191h 11m07:30London YXUChicago ORD
Door to door 4h 21mCO2 137.3 kgChanges 0Fixed, no changes
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From |
|---|---|
| United Airlines | €52.65 |
 SkyWest | €56.19 |
Chicago sits on the water, which usually settles which side of town you want to wake up on. Rooms are not ours to sell.
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When to book London to Chicago
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €67.9990 days
- €47.3460 days
- €42.0345 days
- €43.8030 days
- €58.5521 days
- €95.7214 days
- €114.607 days
- €90.413 days
- €121.091 days
- Cheapest lead time
- Fares bottom out around 45 days ahead, at €42.03.
- How much it moves
- The gap between the cheapest and most expensive lead time is 188 percent. The most expensive point is €121.09, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 45 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €73.89Sun
- €72.12Mon
- €69.64Tue
- €83.33Wed
- €76.84Thu
- €80.97Fri
- €95.72Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
London
Air
- YXU
Chicago
Air
- ORD
- MDW
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 50% of the services we sell on this corridor run through without a change. The remaining 50% involve one connection.
- How far it really runs
- The route covers 558 km against 541 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Kitchener, Toronto. The gap between arriving and leaving is 66 minutes, of which about 14 is walking.
- If the connection is missed
- The tightest connection we sell here has a 14 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves London at 06:19 and the last at 06:47, across 2 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about London to Chicago
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Flight from London to Chicago take?
The Flight from London to Chicago takes 4h 21m door to door, of which 1h 11m is spent moving. The route runs 558 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from London to Chicago cost?
The Flight from London to Chicago starts at €68.58 for one passenger, checked on September 12, 2026. A typical fare is €54.42. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from London to Chicago?
2 operators run the Flight from London to Chicago: United Airlines, SkyWest. Between them they file around 2 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from London to Chicago use?
The Flight from London to Chicago leaves from London YXU and arrives at Chicago ORD. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from London to Chicago?
Fares for the Flight from London to Chicago bottom out around 45 days ahead, at €42.03. The gap between the cheapest and most expensive lead time across the window is 188 percent, measured on September 12, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from London to Chicago produce?
The Flight from London to Chicago produces about 137.3 kg of CO2 per passenger over 558 km, which works out at roughly 246 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for London to Chicago on September 12, 2026: 558 km of route against 541 km in a straight line, 2 services a day, 2 operators, a cheapest fare of €68.58, and 4h 21m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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