$199 Find cheap flights from Chicago O'Hare Airport to London Heathrow Airport

Horrible! I paid for a straight flight from Chicago to London. A week before trip it changed and now I had a connecting flight. Our flight was delayed an hour and a half because our flight crew was still flying in from CA. Forty passengers ran from one plane to the next. The next United Airlines flight was delayed two to three hours because of mechanical difficulties. They had to ready another plane which took time. I missed my scheduled excursion in London. 😢

Lufthansa placed a 300 lb passenger in the aisle seat and I was stuck in the middle leaning sideways with no arm rest or ability to sit up straight and fully use my seat (due to encroachment-the seats are very narrow) the entire flight.

My flight was delayed for a whole day, so I lost a day of my vacation.

Everything could’ve been better. The boarding process was a little tedious, and then they put me in a seat with the window did not open, which gave me a very uncomfortable feeling considering I had told them that. The entertainment system didn’t work for quite some time and because I had to heavily medicate myself to not have a panic attack I missed dinner and barely ate anything on the flight. Not to mention the religious man next to me, praying mostly and humming the whole flight.

United cancelled the flight after a 2 hour delay. The only choice was a 24 hour delay which was then 3 hours delayed.

UK Based crew was great. Very friendly and quick. The seats are just too tight and not comfortable. The plane appeared quite old. Food is better on other non-USA based airlines.

flight delayed, was put on another flight after standby queue, luggage was misplaced and arrived to me 3 days later

The baggage handlers broke the handle on my bag that they put under the plane that I checked on the jetway. They traded it out for a less quality bag in Tulsa. But, they said they would try to fix it. Bologna! There was no fixing that bag handle. Someone didn’t care how they treated the bag.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Perfect flight. Efficient boarding, on time take off and early arrival. Generally smooth flight.

American is a steady for me. I always get what I expect from them. Sincere effort to get me from one place to another.

not enough crew for business class and not great service as a result. underwhelmed overall

BAD. As a family could not sit together. The gate agent told us there was only one seat in the middle left, when we got on the plane the situation was very different with whole rows of seats empty

The crew was very helpful and the aircraft was clean. More attentiveness to us in business class.

Plane was delayed an hour causing me to miss my flight to London and now I am not arriving until Sunday instead of Friday. I am stranded at airport and they give me $12 of food vouchers. It's a joke and everyone I talked to was rude

The Airline was not prepared for weather delays. We were held up due to an incoming flight being delayed and so we did not have a flight crew. This caused an extra delay for departure by 2 hours.

When you pay for Premium Economy and you’re promised amenities for the extra money, you expect them to work. They didn’t. USB connector wouldn’t charge continuously. 120v outlet wouldn’t hold anything you plugged into it. The adapter would just fall out. The noise canceling headphones stopped noise cancelling in the first 15 minutes for EVERYONE. No one on the plane knew how to fix it so I couldn’t listen to any movies. I just put in my AirPods and went to sleep. Very unhappy with the crappy Panasonic entertainment system. I won’t buy premium again.

The plane was freezing cold. Normally I’m fine on planes but I needed to toss a sweatshirt on this time.

I missed this flight due to delays on my previous flight.

Horrible. Garbage airline. Due to the strike we got a replacement plane/crew. I didn't get my exit row seat I paid for. Food was horrible. Plane was hot and didn't have AC vents.

Great customer service. Frequent updates from the pilot. Smooth flight. Good entertainment. Meal service.

The first leg of my 2 flights were delayed, causing me to miss my second flight and have to stay the whole night in Dublin. Super upset with this experience, and I still need to figure out how to get compensated for this.

Everything went well, but could have used a bit more legroom.

The flight got us safely from point a to point b and on time. For a transatlantic flight that isnt nothing. Flight crew was kind and professional. The seats are super uncomfortable (worse than domestic budget airlines) and the cabin was DIRTY.

Long unexplained delay, uncomfortable back row, long waits for trash collection.

Great service on the plane and by ground staff. great prices. I was able to change seats on the plane. The allocated seats cannot be changed when checkin in online. They have to be done at the airport if you check in at the airport or on the plane by asking a stewardess / steward.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

Awful! Flight was 2hrs late and we missed the connecting flight!!!

I bought the ticket through Iberian, but I was unable to check in using my code. American wouldn’t let me check in and Iberian counter was closed.

Basically a smooth ride to Madrid. There was a little hiccup with boarding but it worked out. Overall great experience!

Today, this flight was great. It was on time and comfortable unlike the one on Friday July 12th that was canceled after a very long delay at the airport. Our flight to Newcastle 2 weeks previous was also canceled and the one that flew us to Newcastle, the next day, left Heathrow after it should have arrived in Newcastle. We heard of othe cancelations on this route. BA needs to fix/address this unreliable route.

Super uncomfortable main cabin. Omg no leg space or seat space horrible

Horrible Multiple changes in departing time, agency not calling back with information Horrible

Good seats. Average to poor lunch. The snacks before landing was worse. Great crew.

First flight was 5.5 hours delayed, the notification came within 2 hours of the flight (bags already checked in). connection missed- no one working on getting us on an alternate flight, knowing where our luggage will be. It was chaos figuring out how to get to our final destination. Customer service throwing us into nowhere on the phone- all while we have 2 small kids on us. It will take the whole vacation to recover from this experience. I am scared how the return flight will go in August. Check-in staff (not sure if they are airport hires or iberia hires- beyond rude, especially in Madrid.) On-plane staff, food and entertainment were good.

The service was great and the people are professional. The service was excellent. I will definitely be recommending them to all of my friends.

The check in was a disaster - they don’t follow their own baggage rules. The layovers are unrealistic and Iberia doesn’t help with their own connecting flights. They lost our kids child seats without any recourse. We will never fly Iberia with our family again.

It took an hour and a half for luggage to be dlivered in London

We were seated in the rear of the plane. Buses arrived to take us to the terminal but there weren’t enough so we waited an hour to leave the plane.

Chicago to London flight was delayed an hour . Boarding process was slow . I missed my connection to New Delhi and My connection from New Delhi to Ranchi. Now come the really outrageous part! There was a flight from London to Bangalore that would have allowed me to reach Ranchi on time. I was about to but ticket from Bangalore to Ranchi when BA agent came back after talking to someone in back office and informed me that she cannot rebook me to London Bangalore flight as Bangalore was TOO FAR fro. Delhi. I waited 8 hr in London airport. I was flying business. Hope this review helps the airline. I was not asking for any money back for my missed flight. Anand Mohan

The only issue I had with the flight is that dinner took a long time to come even regardless of the turbulence we experienced. The flight attendants kept disappearing while serving people and kept some people waiting. Which caused them to forget to serve me some tea. It was resolved eventually. Just a small complaint. Maybe there's other reasons but overall the flight wasn't bad.

The check in lady was the best I have seen at JFK she was very nice

The perfect jet stream back saved over 1 hour in the air.

They cancelled the flight from Dallas to London and rebooked following day causing a lot of pain

Baggage handling was very poor, I didn't get my luggage for 4 day's on way back. Neither a responsible person to answer my call. Kindly see my call log on lost luggage reference no BOMBA41916. all details are recorded. Difficult to convince me to fly once again. Sorry for harsh words.

Every flight was late in arrival, last was late in departure and late in arrival, then lost our luggage!

The flight, food and entertainment we all decent, except for a mishap when an attendant accidentally dropped a hot breakfast plate on my son who was fast asleep two hours before landing in London. She was very apologetic, and offered to help pay for any dry cleaning, but we have not received anything from BA. What could have been better, however, was the lack of any support upon landing to make a connection. The original flight from LAX to London had been delayed, so our time between flights had been cut to only an hour. There was no staff helping direct us where to go to get through security. When we approached anyone to ask for help, they acted bothered. I was traveling with four children that needed to use the restroom and get cleaned up after the spill, so we had to stop briefly for that, but again the gate notices directing us where to go only said to get to concourse A, there was no gate assignment. It was a busy time at security, and the process was slow, but we still arrived at the gate 10 minutes before the scheduled departure only to be told the gate had closed. We came to find out that our connection to Paris had actually taken off 5 minutes early, but without us, and six of its passengers. British Airways had to be aware of our delay and known that we had made it to security, but did not make any effort to ensure their passengers could make a tight connection through a crowded airport. Rebooking a flight for 8 hours later was not a pleasant experience and when we finally arrived in Paris at 1:00am, we arrived with only two of our six bags. Again the original flight was okay, but the support on the ground was greatly lacking.