LHR - CHI

$598 Find Cheap Flights from London Heathrow Airport to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Chicago departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chicago, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$758
Typical prices: $1,118-$835
Multiple Airlines
Wed 7/8Wed 7/15
LHR - ORD • 3 stops
Cheapest non-stop
$767
Typical prices: $794-$577
British Airways
Tue 9/1Fri 9/18
LHR - ORD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
BA premium economy adds priority boarding, bigger bags, and 7 inches more legroom.
Iberia Premium Economy and United Premium Plus both offer extra legroom on this long-haul route.
Expert advice
Expert advice
+1
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Expert advice
Expert advice
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Top airlines
Cheapest • from $759 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines, British Airways and United Airlines. Average duration is 8h 52m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
Insights
Insights
Insights
Avoid delays
Most punctual • 94% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $619 (round-trip)
Shortest trip • 11h 40m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 83% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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We hope you love your trip to Chicago!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Heathrow to Chicago (LHR-CHI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Heathrow to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Heathrow to Chicago

Wed, Jul 8 - Wed, Jul 15
Multiple Airlines Logo
1:05 pm - 10:16 am
LHR
-
ORD
27h 11m
3 stops
Multiple Airlines Logo
9:50 am - 11:55 am
ORD
-
LHR
20h 05m
2 stops
$758Multiple Airlines
Wed, Sep 16 - Wed, Sep 23
Air Canada Logo
8:30 am - 8:12 pm
LHR
-
ORD
17h 42m
2 stops
Air Canada Logo
1:55 pm - 8:35 am
ORD
-
LHR
12h 40m
1 stop
$759Air Canada
Wed, Oct 7 - Wed, Oct 21
Scandinavian Airlines Logo
7:05 am - 4:10 pm
LHR
-
ORD
15h 05m
2 stops
Scandinavian Airlines Logo
7:15 pm - 6:50 pm
ORD
-
LHR
17h 35m
2 stops
$760Scandinavian Airlines
Fri, Oct 9 - Fri, Oct 30
Scandinavian Airlines Logo
7:05 am - 4:10 pm
LHR
-
ORD
15h 05m
2 stops
Scandinavian Airlines Logo
8:15 pm - 9:35 am
ORD
-
LHR
32h 20m
2 stops
$761Scandinavian Airlines
Wed, Sep 2 - Wed, Sep 16
Air Canada Logo
8:30 am - 8:05 pm
LHR
-
ORD
17h 35m
2 stops
Air Canada Logo
3:40 pm - 10:00 am
ORD
-
LHR
12h 20m
1 stop
$762Air Canada
Thu, Oct 1 - Sun, Oct 11
Scandinavian Airlines Logo
7:30 pm - 4:10 pm
LHR
-
ORD
26h 40m
1 stop
Scandinavian Airlines Logo
7:15 pm - 6:50 pm
ORD
-
LHR
17h 35m
2 stops
$763Scandinavian Airlines
Tue, Sep 1 - Tue, Sep 8
Air Canada Logo
9:30 am - 7:52 pm
LHR
-
ORD
16h 22m
2 stops
Air Canada Logo
2:01 pm - 6:30 am
ORD
-
LHR
10h 29m
1 stop
$764Air Canada
Wed, Jul 8 - Wed, Jul 15
Finnair Logo
7:50 am - 4:00 pm
LHR
-
ORD
14h 10m
1 stop
Finnair Logo
11:45 am - 10:15 am
ORD
-
LHR
16h 30m
1 stop
$765Finnair
Wed, Sep 23 - Tue, Sep 29
Virgin Atlantic Logo
4:20 pm - 6:33 pm
LHR
-
MDW
32h 13m
2 stops
Virgin Atlantic Logo
1:14 pm - 10:20 am
MDW
-
LHR
15h 06m
2 stops
$813Virgin Atlantic
Tue, Sep 1 - Thu, Oct 1
Virgin Atlantic Logo
4:05 pm - 4:59 pm
LHR
-
MDW
30h 54m
2 stops
Virgin Atlantic Logo
9:30 am - 6:45 am
MDW
-
LHR
15h 15m
2 stops
$815Virgin Atlantic
Booking Insights

KAYAK's insights & trends for Heathrow to Chicago flights

Get data-powered insights and trends into flights from Heathrow to Chicago to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from London Heathrow Airport to Chicago?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Chicago departing in July.

What is the cheapest London Heathrow Airport to Chicago flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from London Heathrow Airport to Chicago costs $679 on the route between London Heathrow Airport (LHR) and Chicago O'Hare Intl Airport (ORD). It is also the most popular route.

What’s the cheapest day of the week to fly from London Heathrow Airport to Chicago?

The average price of all round-trip flights from London Heathrow Airport to Chicago clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Chicago on a Wednesday and more expensive on a Saturday. On your return trip to London Heathrow Airport, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from London Heathrow Airport to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Chicago, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Chicago is June, where tickets cost $124 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $1,338 and $1,130 respectively.

Can I save money by flying with a layover from London Heathrow Airport to Chicago?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $776 on average.

How far in advance should I book a flight from London Heathrow Airport to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Chicago, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Heathrow Airport to Chicago, you should book around 5 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Expert advice

Expert advice for your flight from Heathrow to Chicago

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Duncan Madden

Duncan Madden

Expert on British Airways and LHR

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonJanuary
Cheapest flight$598
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from London Heathrow Airport to Chicago O'Hare Airport

When to book flights from Heathrow to Chicago

Are your dates flexible? Find out the best times to travel from Heathrow to Chicago based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Heathrow to Chicago: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Heathrow to Chicago 
Verified travelerFlew with British Airways
LHR
-
ORD
Jun 2025
I wish I'd known that there were food and shopping opportunities at the B gate area. This was a lovely, NOT busy place to spend time. I'd have gone directly there if I'd known. Definitely a nice place to wait.
Verified travelerFlew with British Airways
LHR
-
ORD
Apr 2025
Make sure to allow ample time between connecting flights. I have to hoof it when I realized that TSA required bags to be picked up and rechecked.
MichaelFlew with British Airways
LHR
-
ORD
Apr 2025
Have a light luggage as much as you can. Boarding gate walk is not a joke.
Verified travelerFlew with British Airways
LHR
-
ORD
Jul 2024
Gate 10 is a train wreck because there are multiple gates distinguished by a letter following A10. If possible get there as quickly as possible to find the appropriate gate.
EmilyFlew with British Airways
LHR
-
ORD
Mar 2024
Bring as few liquids as possible or put them in checked bag. They are very strict at Heathrow about all of them fitting into one small ziplock bag

FAQs for booking London Heathrow Airport to Chicago flights

  • What is the cheapest flight from London Heathrow Airport to Chicago?

    In the last 5 days, the lowest price for a flight from London Heathrow Airport to Chicago was $598 for a one-way ticket and $758 for a round-trip.

  • Do I need a passport to fly between London Heathrow Airport and Chicago?

    Yes, you’ll need a passport to travel to Chicago from London Heathrow Airport.

  • Which airlines offer Wi-Fi service onboard planes from London Heathrow Airport to Chicago?

    Only American Airlines offers inflight Wi-Fi service on the London Heathrow Airport to Chicago flight route.

  • Which aircraft models fly most regularly from London Heathrow Airport to Chicago?

    The Boeing 767-300 is the aircraft model that flies most regularly on the London Heathrow Airport to Chicago flight route.

  • Which airline alliances offer flights from London Heathrow Airport to Chicago?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between London Heathrow Airport and Chicago, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from London Heathrow Airport to Chicago?

    There are nonstop flights from London Heathrow Airport to Chicago on a daily basis.

  • Which is the best airline for flights from London to Chicago, American Airlines or Icelandair?

    The two airlines most popular with KAYAK users for flights from London to Chicago are American Airlines and Icelandair. With an average price for the route of $972 and an overall rating of 7.1, American Airlines is the most popular choice. Icelandair is also a great choice for the route, with an average price of $722 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Chicago?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Chicago.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Chicago?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from London Heathrow Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Chicago?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Chicago

  • Looking for a cheap flight? 25% of our users found flights on this route for $668 or less one-way and $980 or less round-trip.

Prefer to fly direct from London Heathrow Airport to Chicago?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from London Heathrow to Chicago.
Find which airlines fly direct from London Heathrow Airport to Chicago, which days they fly and book direct flights.

Direct departures

London Heathrow to Chicago

Monday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Tuesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Wednesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Thursday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Friday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Saturday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Sunday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

See more direct flights

Direct returns

Chicago to London Heathrow

Monday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Tuesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Wednesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Thursday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Friday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Saturday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Sunday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

See more direct flights

Reviews of the top 3 airlines serving from Heathrow to Chicago

 
See real verified KAYAK customer reviews for airlines flying from London to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Chicago? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11660 reviews
7.2Comfort
6.8Entertainment
7.5Boarding
7.9Crew
6.4Food
Airline reviews

Crew was nice, aircraft dated, entertainment same. Internet is expensive and terribly slow. Food pretty bad

6.0 GoodSebastian, Jun 2026
LHR - CLT
Read more American Airlines reviews

Crew was nice, aircraft dated, entertainment same. Internet is expensive and terribly slow. Food pretty bad

Horrible experience. Food was ridiculous, insufficient, and not appetizing at all. They served sugary granola bar for breakfast. Furthermore, my bags were delayed and delivered damaged and American made it impossible to file for damages. Furthermore, the flights were delayed causing unnecessary stress given the connecting flights. It was awful experience, would never want to fly American.

My table was broken so it made it difficult to eat the food during the service. I was also informed that my luggage did not make it with me to Phoenix. I live two hours away so this makes it even more stressful to try and arrange a time for pick up

Part of my stress and frustration was 50% with the TSA security. However. It is nearly impossible, if you are flying long-range and carrying luggage, to get through security and to the Gate before it closes. I was scheduled to fly out at approximately 12 and got hung up at TSA from 11:00-11:20. When I looked at the screen, the gate was already closing. I have to run to gate 24. Barely made it - all that to say you might consider lengthening the connection time by at least 30 mins.

Very hard to beat a British Airways international flight…the crews are always so amazing! One flight attendant that really stood out was Emma…she was very personable and accommodating with any request we had!!

The passport line was so long that many of us were concerned about missing our flight and some did. It would've helped if a AA representative had gone to the passport check-in sooner to advise that boarding was closing and those flying that were stuck back in the line, needed to come forward with apologies to others. An AA representative did do that but only after boarding had already closed. (They delayed take-off so that more who were running with carry-ons could get to the gate - especially stressful for older people!) Then to be crammed into a seat with barely enough leg room for a thin woman, 5'7", like me, much less for a taller, bigger person was not comfortable, especially if the person in front decided to lean back. Crew was fine, food and entertainment also.

The seat when "flat" was not flat and pad was too thin to cover it.

Awful customer service, horrible experience. We travel a lot domestic & international- worst flights to/from ever. Brief bkgd as Inhate to relive this experience: booked and chose 2 seats 4 months prior in Premium Economy - last row end seats close to bathroom, no one behind us, plenty of legroom;, underwear storage — flown this was on other airlines, love it. We receive notice 4 days before scheduled overseas flight - plane has changed, new seats assigned. Seats are split into single seats, opposites of the plane, FRONT Row so no reachable storage. Called BOTH British Air & America. American “switched planes and the seats you want are taken;” British Air “Yes, we’ll be glad to accommodate you (type type type). Just ask at the Gate and someone will give you new boarding passes with seats together in middle, OK?” — OK. —At Gate the attendant looks us up saying “No, it is an overbooked flight and yours are the only seats available.” But but but wait, “We were TOLD our seats had been switched and seated together?” Gate attendant “Well they were wrong and don’t change your seats. Your original seats are where you’ll sit.”. Right. No help WHATSOEVER. We sit opposite on way there, wife VERY disgruntled, a Tol 5 worst ways to start a 3-week bus tour of UK. We promise to NEVER FLY AMERICAN OR BROTISH AIR EVER, and we have 3 more extensive trips planned..

They lost my bag. ... And I asked them 3 times to 3 different people if my checked bag will maKe it all the way - they all confirmed and at the end it was left at the connection... Bravo

British Airways is an excellent airline. Comfort, food and airline personnel.

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

Awful. The Iceland airport was a complete mess. Boarding was a chaotic, the seats were awful, there was a group of rowdy 20 something men in our row hooting and hollering, ordering alcoholic drink after drink. Yelling and laughing at the top of their lungs and the crew just went along with it. Passengers complained to the men, asking if they could keep it down (it was a night time flight so people wanted to sleep). They never listened crew continued to laugh with them, flirt with them and serve them more drinks. No free food or snacks, seats were horribly uncomfortable. Worst flight I've had in a long time

At least one soda free, felt like I was nickeled to death.

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

Was a bit surprised that Icelandair flies a domestically configured 757s on long-haul flights to Iceland (no lie-flat seats in business class).

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

The most uncomfortable seat i’ve ever had on a flight

Seats not as comfortable as I had hoped. Food was very nice, service was fine. Entertainment options very nice. Had thought the premium economy was a more plus 2-3-2 layout but it was a 2-4-2 with seats not as wide as I had expected.

I flew four flights on British Airways within two weeks. I was unable to download the boarding pass to my phone for any of the four flights. I could check-in for my flight but the system would not give me boarding pass. I tried multiple ways and multiple times. I discovered many other passengers also had the same issue with their boarding passes. No explanation or acknowledgement by BA.

Lovely big plane. Excellent take off and landing. Cabin crew were so nice. Flight in time no delays

Because our ABZ-LHR flight was cancelled by BA for reasons they refuse to tell us--not weather--we did not make this flight and were booked on the following day. BA offered no assistance to us on the phone or in the airport, and we had to find a hotel at Heathrow on our own.

Horrible - flight was delayed by 6 hours - we boarded, were made to de-board due some technical fault; aircraft changed; special meals request on new flight - all went awry. Landed in Dulles airport; breezed thru immigration; as Business Class passengers or baggage was delivered almost 90 minutes after landing; air tags indicated the bags were just near the carousel but the unhelpful BA staff - Maria and Ghina refused to give any update - palming it off on some imaginary invisible “manager” despite air tags evidence showing it right there. So about 50-60 passengers waiting and getting infuriatingly impatient for their bags coz one container was not delivered. Finally after much argument by some other passengers Maria condescended to go to the “ramp” and within 5 minutes the baggage was delivered miraculously. Question is why couldn’t she have done it one hour earlier ? Poor poor experience once again on Business Class BA.

Cheap Flight Fares would not provide booking info. I canceled the reservation and we arbitrated with American Express. They provided erroneous info to Amex and it was determined that C.F.F. deserved the price of the ticket. Worse experience I've ever had.

Seating space is appalling. Seats and all surrounding area in "Economy" is built for individuals shorter than 4' 10" and below 120 lbs. Ridiculous. While I'm not expecting fine dining, the food was the worst airplane food that I can recall.

Business class lounge for my gate was closed and no email was sent, causing me to walk back and forth to different gates, etc for over 20 minutes one way. Flight entertainment was mediocre with very poor choices especially for business class cabin. Original flight was cancelled and rebooking was difficult and no reason given for cancellation.

Very comfortable flight and simple and directed one way and back. Amazing price.

We loved our flight attendant, Emma from Scotland, the meal and entertainment offerings were wonderful, the flight was smooth, and enough leg room to stretch. We would fly with you again!

Everything you need to know for your flight from Heathrow to Chicago

Information on your arrival and departure airports