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

Cons: "The back of the plane was significantly warmer than the rest of the plane. Very little leg room."

Cons: "More room. Not losing our luggage at the end."

Cons: "On the Copenhagen-Milan leg, since I was in the cheap seats, even water cost; $3 for a bottle of water. They couldn't even offer a cup of water for free? False economy. And I was told that I had to pay for my luggage at the airport, then it was $120 for 1 bag. Ridiculous!"

Pros: "Excellent and professional crew members"
Cons: "Nothing, the flight was smooth, most enjoyable"

Pros: "Clean and very good stewardesses"

Pros: "On time travel. Check In Staff were kind and engaging."
Cons: "On flight staff were minimally attentive. Food was mediocre."

Cons: "The food offering"

Cons: "Flight to Stockholm was cancelled. SAS Provided no informaton on the steps for re-scheduling my flight. I had to call the SAS headquarters in Stockholm before receiving any guidance on what to do next. All service attendants ditched the ticketing desk leaving one poor employee to answer questions for over 70 disgruntled passengers. Very very very poor communication. Luckily I was finally able to book a flight using another airline after waiting on hold for 20 minutes with the regional customer service provider."

Pros: "The staff and other guests are always so polite! Getting the SAS Lounge Pass is always smart."

Pros: "People were very kind. The food was terrific!"
Cons: "The entertainment system was slow."

Pros: "Aisle seat"
Cons: "Nothing was complimentary"

Pros: "Very comfortable and smooth flight, on board entertainment on first leg of trip was great. Food was fresh and good. Nice coffee & Tea service,"
Cons: "Boarding was a little scattered, but ok"

Pros: "Easy boarding. Friendly staff"
Cons: "N/A"

Pros: "One crew member was particularly nice and personable."
Cons: "We waited an hour in the plane before take-off and after boarding, during which time the crew deliberately filled the cabin icecold air thick with the highly toxic fumes from the deicing. I got a headache from it. Throughout the process the entertainment units were disabled, when they could have helped distract passengers from this ordeal. The food was disgusting. When the Danish government has repatedly bailed out SAS, it would make a lot more sense for everyone involved to have higher quality Danish products on board for the meals, especially for such things as dairy products."

Pros: "On time, easy boarding"
Cons: "The flight was nearly full and everyone seemed to have at least two cases. This caused lots of jostling for space in the lockers"

Pros: "Pleasant crew"
Cons: "Boarding was shambolic and the 737 is not as nice as the new A320 in terms of comfort or amenity. Boarding was all over the place - and the gate agents clearly need extra people around for a full flight. One person for 170 ppl didn't feel right."

Pros: "All went well !! On time friendly staff ."

Cons: "They only offered tea and coffee for free as a drink and nothing anything more, and were not kind at explaining this."

Pros: "Crew were excellent, had a row to myself, luggage turned up quickly"
Cons: "No landing cards given!"

Cons: "Food was really, really bad. Only one very bad choice ignoring health conditions of different passengers."

Cons: "Water and beer paying"

Pros: "boarding is different and they were talking over pa announcements at heathrow so you could not hear what to do. you go through one ticket agent to the down stairs to another ticket agent. everyone knowing what to expect crowded around the second ticket agent and there because of that forget about boarding by row or zone you couldn't get throught the crowd. plus the second ticket agent was right next to the downstairs escalator so people coming late got on before us."

Pros: "The food was very good surprisingly"
Cons: "Again the seats are too tight and they should not be allowed to recline"

Pros: "Upgraded 2 biz 4 reasonable $, everything great"

Pros: "Everything was great"
Cons: "Nothing to mention"

Pros: "Comfortable flight, friendly crew. Would fly again!"
Cons: "Food could have been better"

Cons: "I did not like my flight because ... I could not take it! I needed to change only one date (return) and was quoted $1300 for that one change. Getting a completely new ticket was cheaper, but not cheap. With such cost of even minor changes, next time I will look into booking directly with airlines, instead of Kayak; sorry to say that, as I really liked using your service."

Pros: "Nothing at all"
Cons: "Fight was canceled and no email or communication was possible with this company. Called SAS office - CLOSED. Stood in line for 2 hours and no one came or announced anything. Checkin agents were on dope-no help and checking machines not working!"

Cons: "Out of all the staff on board they did not give me and a few others those blue customs form, so we made a huge line and when we got to the agent he told us we had to go all the way around fill one out and then come back. The attendants new that those were necessary why so many yet not one made sure we got them lousy service. I wish we got a crew that wasnt so insecure and cared more about providing a good service instead of caring so much over their appearance. I rather have good efficient staff what they look like doesnt matter to me."

Pros: "Excellent meal and very friendly staff."
Cons: "The cabin temperature seemed pretty warm."

Pros: "Comfy and good movies!"

Cons: "Not even one bag was included!! And to add a bag is extremely expensive!!! Paid five hundred dkk for one bag!!! Terrible service as well!!!"

Cons: "Not enough room to work on laptop."

Pros: "12 people got bumped!"

Pros: "Wide seats with excellent leg room in exit row- a bottle of water waiting at or seats-- we love the two seat configuration --attendants ready to serve any need with a smile."
Cons: "Bought our tickets from Kayak and as a result had a very difficult time upgrading seats."

Pros: "Easy embarkation, helpful staff."
Cons: "Shock to discover that suitcases were not included in price of tickets purchased online. We had to pay the equivalent of $100 (australian) per case. My seat was extremely u comfortable as the cusihion was misshapen. The male passengers seated behind us were drinking alcohol and became loud and garrulous, making the trip most uncomfortable and unpleasant."

Pros: "Flight was Ok"
Cons: "Left till last to board flight. Case taken from me. Asked continually when I wld be taken as I am 83 and recovering from major operation. Told 45 minutes before flight but was taken 10 minutes ahead. Rush has left me very upset."

Pros: "Wonderful service! Flight attendants kind and thoughtful. Once in terminal 5 (from terminal 1) a Sas gate agent escorted us to flight since our previous United flight was so late"

Pros: "The flight crew (flight attendants are the best I've encountered in terms of tone and hospitality) cleanliness, the food, frequent offers of water, your own TV and numerous options for entertainment and ability to track flight"
Cons: "Like the sleek style but still wish there was a little more leg room"

Cons: "Miserable cramped seating ."

Cons: "1st class could not board because that area was not cleaned"

Cons: "I asked for water and was given half a cup, when I requested they fill the cup they said if I wanted more I had to buy it. In addition, when we left the plane everyone pushed their way off instead of following the order of the rows."

Cons: "Disorganization and unpreparedness."

Pros: "Flight was fine, cr"

Pros: "Same as above"
Cons: "Same as above"

Cons: "Charging for second beverage. Losing our bag and not getting it to us for the duration of our travels, despite repeated promises to do so."

Pros: "Free upgrade to SAS Plus, what's not to like!"

Pros: "The Plus Seating was really good"

Pros: "Lucky is the passenger to get onboard a new SAS plane! Cleanliness aside. The built in phone chargers to the tele is genius. Nice to land fully charged!"
Cons: "I didn't like that they interrupted programming to announce they were walking on board shopping through the cabins. They did this twice! Really unnecessary!"

Pros: "Great company!"

Cons: "It was very warm on the plane for the 6+ hours of flying, making it difficult to sleep or be comfortable."

Pros: "Everything was good for economy class."
Cons: "The first leg of our Iceland Air fight was delayed, but they didn't update the departure time until after it was obvious that the plane wasn't going to be there on time. So we hurried to the gate only to wait nearly an hour. I wish they had updated the departure time earlier."

Pros: "Flight attendant was really hot and super helpful"
Cons: "Getting our actual row that we selected"

Pros: "Really comfortable plane"
Cons: "Slow boarding"

Cons: "You could have told me ahead of time that it costs $95 to bring a suitcase on board"

Pros: "It was Delta Airlines"

Cons: "The first leg Chicago to Iceland was uncomfortable due to the seats for some reason. From Iceland to London seats were much more comfortable. Iceland employees are the most friendly and helpful airline people I have ever dealt with."

Pros: "Connection gate in Rekyaveck wa. Sry convenient"
Cons: "Seat comfort for a new plane was terrible"

Cons: "Did not get the extra legroom we paid for, plane was awful hot and stuffy. Crew allowed 3 kids aged about 4 to 12 to literally run up and down the aisle, running into people and screaming."

Cons: "When booking I was certain I booked checked luggage, when I got there it wasn't included, I never received a proper receipt. Boarding was delayed fit 40mins and not communicated"

Pros: "Everything was on time , perfect"
Cons: "Don’t know"

Cons: "Very limited food choice."

Cons: "Seat uncomfortable"

Pros: "Plane was clean and the crew gave excellent service. I loved breathing in the cold air when I got off the plane on the tarmac. I didn’t even mind the quick bus ride up to the terminal. The Reykjavík airport is very calm, quiet, and serene. After a Chicago, it was quite pleasant!"
Cons: "This is my first time flying Icelandair. Paying for food on a transatlantic flight really surprised me! I wish I would’ve known this ahead of time as I thought I was getting dinner on my flight. Next time I’ll pack a sandwich."

Pros: "Everything was on time and no hassle with boarding passes luggage and boarding. I liked that there were 2 exits in Iceland. All staff that we encountered were awesome. Overall a good flight. Loved the entertainment options. Liked getting the water bottle when we boarded and the blanket and pillow."
Cons: "I was expecting a bigger plane and seats for overseas travel. I was surprised when the plane was same size and capacity that I fly within the continental US. I could not fit my usual carry on bag under the seat in front of me and I can always fit that under on other flights I’ve been on. I felt the seats were really tight which made it difficult to sleep. Sleeping on the plane is necessary when traveling internationally."

Cons: "That it said on my itinerary that I had economy class but then they still charged me $90 to check a bag. It didn’t say anywhere that my ticket was economy light. I would have bought my bag beforehand to save money but it was not clear at all."

Cons: "No meal service"

Pros: "Blanket and pillow already on chair. Pilots did an awesome job landing in a blizzard."
Cons: "No offer for headphones"

Pros: "We had a ton of space and it was so comfortable. I would fly with them everywhere I go if I could."
Cons: "Theres nothing I would say I “didn’t like”. Great experience."

Pros: "Good price"
Cons: "Poor poor poor customer service."

Cons: "See above."

Cons: "The people at the airport itself are some of the most rude people I have encountered in all of my travels. Throwing my tray back at me while I was putting my shoes in it and saying “it’s not done, take it”. She bruised my stomach because I tried to stop it and grab it, and dumped my stuff, including a now broken camera. Very unprofessional and not necessary."

Pros: "See Above"
Cons: "See Above"

Pros: "Service seamless,"
Cons: "Seats not the most comfortable in the world, could not figure out entertainment, wifi did not work"

Cons: "Landing was terrible ."

Pros: "I saw a lot of bad reviews and got nervous, but I had no trouble at all. I only wish they served food..."

Cons: "no communication from crew and cockpit. we were sitting an hour on the runway without getting info what is going on. almost missed my connection because if the delay, where btw the crew won't give you any information either about connecting flights (e.g. gate#)"

Cons: "Sisters bag arrived fine. Mine will not arrive until tomorrow."

Cons: "Included in previous comment"

Pros: "Enjoyed travel videos about Iceland that you could watch before arriving."

Pros: "The Aurora lights on the overhead compartments was a pleasant touch."

Pros: "The crew, amenities, and service were great!"
Cons: "Didn't enjoy having to be transported to the train by bus in Reykjavik, since there wasn't a jet bridge connecting the departure level of the terminal to the plane."

Pros: "We really loved the price and the service was fine. Having the stopover in Iceland on our way to England was a treat and the schedule was fine."
Cons: "Bugged me that they charged for a meal on an intercontinental flight."

Pros: "Crew were polite, though they didn't hand pillows and blankets out to everyone. I declined a blanket, since I had one from the first flight, but was never offered a pillow, which I would have accepted. The style of this plane provided a ton of head space, which was really nice."
Cons: "The seats were really uncomfortable for such a long flight. Also, the entertainment system was having trouble for half the flight before they finally fixed it."

Cons: "Missed connection by a minute and got delayed ten hours."

Pros: "Too warm on flight. No overhead vents to control"
Cons: "Too warm. Seats and leg room seemed tighter than other airlines."

Pros: "Easy boarding. Delayed but arrived on time."
Cons: "No meal"

Cons: "Late"

Pros: "The airline hospitality was very good. If our flight was on time the 40 minute connection would have been fine. Iceland airport is very small and easy to get throu."
Cons: "Our first plane didn't show up or have fuel, so we departed an hour and a half later. We missed the connecting flight in Iceland, but they already had us booked on another flight that day."

Pros: "Complimentary water bottle, pillows and blankets on each seat upon boarding, entertainment selection"
Cons: "Flight very late, no food offered except for purchase"

Pros: "Loved the Saga Lounge - that was a great treat for us, as we were unaware that it was available to comfort economy passengers until we were informed at check in."

Pros: "Nothing"
Cons: "Everything"

Pros: "Peaceful and smooth until the landing."
Cons: "Landing quite rough."

Pros: "Very pleasant crew."
Cons: "1 of my bags was delayed accidentally."

Pros: "The flight was very comfy. Icelandair has large planes that don't feel at all cramped even in economy. The flight staff was very friendly and helpful. Keeping everything near and orderly. Made for a great flight."
Cons: "Only thing is we ran a little behind and the left my suitcase in Reykjavik. So I arrived to Zurich with only the clothes on my back and 1 change of clothes in my carryon. hoping for the airline to deliver it soon. The Zurich airport was quite helpful in making me a lost bag report and giving me a tracking number and even looking up where my bag was."

Pros: "This was probably the worst flight I have ever been on (and I have flown internationally a lot - and travel weekly for work purposes Icelandair - hands you a bottle of water and you never see the flight attendant again - this for a 6 hour flight!!!!!! the plane was extremely hot there was no communication to tell people what was going on, that we were late, agents to help - etc etc - nothing needless to say - I will never fly Icelandair again others were worse then us - some had no flight to be redirected too - and side note - the customer service counter at Birmingham - had NO ONE there for over an hour - they had to finally call someone to come down and help the many people there"
Cons: "Icelandair was delayed out of Chicago - but the agent stated our flight would be fine - we would only be arriving 15 min late - and even so - they would "hold" the flight" . We arrived and ran to the gate- people were still boarding - gate was open and the agent said to us and others - oh you are the Chicago people - you have to go to customer service. We find out we have been "bumped" off the flight and placed on a new flight 2 hours later with a non direct flight - we have to go through Birmingham now. We are delayed again out of Iceland and get into Birmingham 1 hour late. We were never told that we had to reclaim our luggage. When we preceded to reclaim our luggage - there was NO luggage. and spent over an hours looking for it Icelandair never put our bags on the plane - and stated they would go on flights sometime the next day - we still have no word"

Pros: "Crew was relaxed and kind."
Cons: "Delayed boarding. We left an hour late which resulted in a sprint through Reykjavik and missing luggage when i arrived at my final destination."

Pros: "The 2nd flight waited for the delayed flight from NY which was much appreciated."

Pros: "Nothing"
Cons: "We didn't fly Icelandair, the flight was delayed more than 5 hours because there not enough passengers. Took an extra day to get to Brussels. Not impressed at all. I will be calling Icelandair for compensation."

Pros: "Good"
Cons: "Good"

Pros: "The crew."
Cons: "Fake marketing! They said it will be some snacks for economyXtra, and then 2 hours before the flight sending an email saying that the snakes will be charged! Disappointed!"

Cons: "I paid Xtraeconomy to have some snacks during the fly, and they end up coming with a trolley to pay! Disappointed!"

Pros: "The crew were very nice overall but one flight attendant in particular was incredible. I didn’t get a name but he was friendly, welcoming, and kind."
Cons: "I sat in an emergency row with an empty seat to my left and really did not like how the passenger in the row behind me kept getting up and walking into my row to get his stuff from the bins."

Pros: "Sleeping and being left alone"
Cons: "Food, Service by cabin crew because they never smiled"

Pros: "Amazing punctuality, both on the way out to Lisbon and on the return to London."
Cons: "Cannot really think of anything that needed attention on these flights."

Pros: "The entertainment was ok."
Cons: "Everything else was terrible. From check-in to boarding to flight."

Pros: "The lady checking me in was nice"
Cons: "Items were stolen from my bag"

Pros: "Super friendly"
Cons: "Maybe a hot meal?"

Cons: "Maybe have one flight be on time. Train ground crew how to put on fuel."

Pros: "Good entertainment, great price"
Cons: "Had about 30 people on our flight that was taking another TAP connecting flight - missed the gate by less than two minutes - did not hold the plane when they could have"

Pros: "It got us to our destination."
Cons: "Seats sucked. Screaming kids. Wouldn’t let us bring our carry-on for the last leg: Lisbon to Barcelona even though there was room."

Cons: "Ok, it's TAP, it's a bargain, but the "breakfast" was a pitiful piece of meat on a stale piece of bread"

Pros: "Food was ok"
Cons: "Worst accommodations for baggage on a international flight in my opinion.Pay for a bag is the best advice in my opinion this airline barley lets you bring anything with. Disgusting plane it was so dirty I took a shower after this flight and the amount of dust in the air was visible terrible"

Pros: "The crew was great."
Cons: "My baggage did not get delivered to the final destination, that could have been handled better."

Pros: "Nothing"
Cons: "We were not able to board the plane. We left our morning flight from Madrid on time and arrived as expected. We hurried through the airport and went exactly where we were directed. Despite this, the gates closed on us while we were running to the gate. TAP sold us a service they could not provide."

Cons: "So many delays, no real info provided. When we had to stay overnight they didn’t mention it would take 4 hours to get our bags which actually never came. Airline industry sucks and deltas one of the worst."

Cons: "Not cancelling it"

Pros: "Nothing"
Cons: "Been on schedule."

Cons: "Not enough space for hand luhggage. Changed gate very short before boarding. No gluten free meal available on board."

Pros: "flight was more than 4 hours late!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
Cons: "flight was more than 4 hours late!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

Pros: "Very on time, smooth take off and landing and friendly staff."
Cons: "Perhaps spirits offered other than just wine. And a vegetarian food option."

Cons: "Passport control in Lisbon was awful and many people missed their flight in spite of them being made aware of the issue."

Pros: "clean and fast"
Cons: "use airport finger in Lisbon airport"

Pros: "Nothing"
Cons: "Everything"

Pros: "Surprised and delighted to be served a tasty sandwich and fruit drink plus glass of wine on a 3 pm 2 + hr flight from Lisbon to London"
Cons: "Seats uncomfortable"

Pros: "The drinks were available."
Cons: "The drinks were expensive."

Pros: "Clean modern aircraft"
Cons: "Left 35 minutes late; had to take a bus to the plane in Lisbon (no gate)"

Cons: "This survey is useless. Keeps putting things wrongly and drops things"

Pros: "Price"
Cons: "Business flat seats quite restrictive"

Cons: "I booked this flight months and months ago on Kayak, excited by what I thought was an excellent deal to go visit an old friend. When I got to the Boston airport, I was told there is a fee to check a bag with the ticket type I purchased- of 90 DOLLARS each way!!! This is absurdly expensive. I tried to pay with cash as I had very little on my card, and was told this isn't possible. So I had to pay the fee, and arrive at my 7 hour layover with next to no cash on my card- too little to buy a meal in the airport. So I had a miserable layover experience. I do not recall seeing this baggage fee listed anywhere on Kayak when I booked my flight- it looks like this policy took effect in September 2017, but I booked my flight in July. I am very upset about this additional charge- it is dishonest and I will not be flying with TAP again. I am also considering using alternatives to Kayak, as the TAP representative said that it's Kayak's fault the baggage fee wasn't listed."

Pros: "The crew did a great job."
Cons: "The boarding process was nutz. We had to take a bus away from the terminal to board the plane. The flight was delayed. I was not very happy to have to spend $92 to check 2 bags."

Pros: "Of no change is BULLSHIT"

Pros: "Flight on time and safe Crew very pleasant"
Cons: "Cramped seating Boarding dreadfully slow"

Pros: "the food , drink and the crew"
Cons: "seats not very comfortable. plane full up"

Cons: "We booked flight several months ago and it included seating assignment, so we choose our seats. Then when we check-in they had changed them to the last row of the plane. We had received a couple of emails asking for us for option to pay for advance seating. Assume they had changed their policy and now were charging. We had a close connection at LHR and being last off, we almost missed connection. Horrible"

Pros: "Food is worst I ever had in business class in 15 years of frequent flying. Worse than even many economy classes. Worse than many shirt hauls. Service is poor. Seats are super old. Only upside: on time"
Cons: "Nothing to like here except timeliness"

Cons: "The delay on the take off"

Cons: "We had to postpone our first leg from London to Lisbon by a day and then they cancelled our return flight without telling us!!! So, we were trapped in Lisbon with no flight to return home. We called them and they said, "we cancelled your tickets and only have business class seats available for you and your toddler." We said no thank you. If we were going to spend 1k on a return flight, we were going to take British Airways. TAP, never again."

Cons: "The service was below average, nobody seems to be eager to assist. The food that was offered on the flight was below expectations. The company should work on improving customer care"

Cons: "No vegetarian option The last seats mean can't lean backwards when someone in front goes backwards :("

Pros: "Crew friendliness and attention"
Cons: "They ran out of diet coke and coke zero literally right after takeoff which is a joke!"

Pros: "Very comfortable flight."

Pros: "I was very impressed with the Ground crew who met me off the plane and had already arranged for me to go on a later flight with Emirates. If it had been possible to let me know when I was on the first flight that my onward travel had been arranged then it would have been perfect."
Cons: "my TAP Portugal flight from Lisbon to Heathrow was so late I missed my connection to AbuDhabi."

Cons: "The lady changed my 11H seat for another seat (29B) when I claim that this is not fear , a man said to me that if I insist in this matter he will not let me in Or flight , for me this was an abuse"

Pros: "Everything was perfect! The staff was friendly and the food was nice. I found that there was more leg room than on other airlines."
Cons: "I used TAP to depart beautiful Portugal."

Pros: "Not much. Lunch"
Cons: "We paid to check the bag In and when we arrived the girl could not see this. We showed her clearly the paper then she charged ya and realised she had made a mistake but couldn't refund us. Terrible experience. Don't use the."

Pros: "Flights were on-time, planes were clean/newer, snacks were good."

Pros: "TAP counter staff helped get seat assignments for knee injury. New aircraft with good video system and comfortable seats in Economy Plus. Crew was helpful. Food OK. Arrived on time."
Cons: "Not TAP's fault, but long lines at customs and security at Lisbon Airport made us run to arrive at gate for next flight. Again, not TAP's fault, but additional security check at the waiting area, opening carry-on baggage and emptying my purse seemed over the top."

Pros: "The flight was fine, no issues. Plane was fine, no WIFI or entertainment. Served a small meal. For the price, excellent trip."
Cons: "All was good."