Daily cleaning, installation of cabin HEPA filters on flights from Colorado to London
American Airlines, Aer Lingus and Finnair have all waived their change and cancellation fees on flights from Colorado to London. Confirm policies on booking site.
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 Colorado to London.
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Colorado is likely to change within 7 days, so travelers know whether to wait or book now.
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 London with an airline and back to Colorado with another airline.
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 London from Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
Scores according to KAYAK customer reviews
Cons: "Minor point. They boarded the plane very early. We got to the gate 1/2 hour before departure, and were almost the last ones to board."
Pros: "The plane was nice and quiet, and the crew was lovely."
Cons: "It was so cold!!"
Pros: "I did not make it on the flight as the time was given was 5:35 and the flight left at 4:00."
Cons: "I was not given correct information and being a very novice traveller did not check the information."
Pros: "Crew were very caring. Seats were OK"
Pros: "Did not fly. But delayed by a while"
Cons: "Tv in the seat to make the long flight pass more quickly."
Pros: "Comfort, timing. Customer Service!"
Cons: "Technically problems with lightning on board."
Pros: "Crew were great, service was spot on."
Cons: "Plane was old, seat didn't recline, no tv screens in front of seats, temperature was freezing (but in fairness I was at the emergency exit) and worst of all NO MEAL?? ON A NINE HOUR FLIGHT? Arrived very hungry."
Pros: "Boarding went well. Although it was a full flight, they asked for volunteers to check in hand luggage (free of charge) I did, trying to help. But once I picked up my luggage and got to destination point, I noticed that 2 small items (gifts for family) had been pilfered. Not happy and will not volunteer to help again."
Cons: "No food on plane, no entertainment,( unless you download the app) Above pilfered items"
Pros: "Neriande (who issued the boarding passes & took checked bags) and her colleague At the check in desk were amazing - actually going behind the scenes to find a gate checked bag that had been wrongly named and was headed for Toronto when we were headed to LONDON GATWICK"
Cons: "Faulty weather radar on a stormy evening cancelled our WestJet PREMIUM ECONOMY flight. After deplaning and waiting for all passengers without checked bags to be rebooked, we eventually were on our way by car from LGA to JFK airport to meet a British Airways ECONOMY flight with only minutes to spare"
Cons: "On time"
Pros: "Excellent all round. Good price. Nice seats. Excellent staff. Good boarding and disembarking. Highly recommended."
Cons: "It does not have free food and entertainment, but for the price this is acceptable."
Pros: "Good service. And snacks served"
Cons: "The food was extremely mediocre for an $18 meal."
Pros: "Staff were helpful and smiling. Good value"
Cons: "We needed a better choice of food"
Pros: "Friendly and helpful staff. Boarded and got off quickly. Clean airplane."
Cons: "I felt cramped in my emergency exit seat, especially having a larger size person sit next to me. My seat was not comfortable. Being tall provides no advantages on westjet. Had to look down at my phone the whole time for entertainment, neck hurt. Wont fly again"
Cons: "Plane seemed older and less leg room for a 6’4” guy. No TVs or monitors to track flight info."
Pros: "Kind helpful staff"
Cons: "That you have to pay for entertainment and food on long haul flights"
Pros: "The low cost"
Cons: "That which comes with low cost, you get what you pay for"
Pros: "Loved WestJet! They are the best airline, always super friendly"
Pros: "staff on airline great"
Cons: "Lost my luggage hopefully I’ll get that tomorrow. Airline charged me 70 pounds for that. Staff at customer service were not helpful at all."
Pros: "Great staff. Fast boarding and deplaning."
Pros: "Hi. I actually am glad that the company is following up because I was having a hard time finding an email to contact. I actually came to kayak to book my ticket for Friday to go to London however when I got to the airport it says it was for Monday. Because I had to be at London the next day for a wedding i had to buy another ticket for almost 1000. I also couldn’t contact u so I’m emailing now. I didn’t get on the plane for west jet because I am already in London. I also have a screen shot that shows me that my flight details were for Friday however another email shows me that it’s for Monday. Even the workers at th airport were confused and felt strongly bad for me. I would like a full refund as well. Thank you. Please contact back. 416806-6530 or email me at email@example.com"
Pros: "It was a clean plane and a pleasant enough flight."
Cons: "I was in the window seat. The guy in the middle seat spread out so much he was pushing me against the side fo the plane. Really uncomfortable."
Cons: "Our original flight was cancelled due to WestJet reasons (plane was not safe to fly) the following evening the flight was supposed to depart at 7pm we didn’t take off until 10:37 pm causing an arrival of 940AM into London instead of 7:23AM primarily because the crew they chose for this new flight was coming from Montreal so we had to wait for them to arrive."
Pros: "Staff was good"
Pros: "Crew was friendly."
Cons: "Lack of maintenance. Seats did not recline, seat in front of me was broken. No reading lights available. One washroom became inoperable. Just showing a lack of maintenance or cost saving measures until new planes are delivered. Not a great impression for a carrier striving to compete against Air Canada. I would say they are competing with Air Transat."
Cons: "Big 4 hour delay caused that we missed another flight in London"
Pros: "We survived"
Cons: "On an 8 hour flight there’s no complimentary meal. I paid for a meal and it was worse than free plane food and starved for the rest of the trip. The chairs were horribly uncomfortable with no lower back support and we were not even given pillows and blankets. There was also no free entertainment. I rented a tablet and had it taken away an hour before landing while I was in the middle of a movie. I might have been ok with that if the flight attendant had politely asked for it back rather than rudely waving and pointing while I stared at her blankly trying to figure out what she wanted. Next time I’ll pay a bit more for an airline that respects its passengers and our comfort."
Pros: "Excellent Flight to London"
Cons: "Typical Econofare - pay piece meal for everything including a checked bag."
Pros: "Free upgrade and gate check!"
Cons: "No checked bags or meals for economy passengers"
Cons: "Pre-ordered meals are costlier than those purchased on board. The crew explains it by saying that they give some extra food just before landing, in lieu of that but what they give is too meagre and its not the customers choice."
Cons: "My ticket/reservation was not found by WestJet. I had to buy a new ticket. Flight Network or Emirates screwed up. I will need you and them to reemburse me. Please investigate."
Pros: "Landed 10 minutes early. Good landing in tough conditions"
Pros: "Very cheerful and friendly crew. Made the journey very enjoyable."
Pros: "Comfort, friendliness and ease of travel with Westjet"
Cons: "Can't think of anything"
Pros: "Basics of chips or pretzels as one food offering"
Pros: "Friendly, polite crew. Well organized boarding"
Pros: "comfortable seats friendly crew"
Cons: "no entertainment system, fee for renting tablet not enough room in overhead no complimentary food or drink service"
Pros: "Only problem is my flight didnt have screens and you had to pay for a tablet. I get screens on my flights to Edmonton and Sask for work with Westjet all the time but on a long flight to London they're majorly lacking. A basic meal over a 9.5 hour flight should be included as well."
Cons: "1 for usb charging ports though. I still love Westjet but different priorities for International flights should a no brainer."
Pros: "Helpful polite staff. Many great movies and tv shows to select from."
Cons: "Trying to sleep in an uncomfortable, small, non reclining seat."
Pros: "The flight is decently cheap"
Cons: "Everything else is not really pleasant for a long distance travel. I've never felt more uncomfortable in my life during a flight. But i suppose you get what you paid for."
Pros: "food was good"
Cons: "Delays in connection flight, arrival gate and departure are far away and no help from airlines."
Pros: "the entertainment system was incredible."
Cons: "It was a very long flight-- including a meal in the ticket would have made it more enjoyable."
Pros: "Boarding was quick and easy, and the gate attendant was quite friendly."
Cons: "Very rude crew members; delay leaving YVR. Instead of being honest and upfront about having to leave an HOUR later--and also lying by saying that we'd be flying into Gatwick in only 8.5 hours as opposed to 9.5--they made us wait in our seats while the craft supposedly waited for food to be loaded. The best line was, "Our plane will be landed an hour earlier! But because London doesn't like it when we land early, we're going to wait here for a while on the tarmac so we make it there on time.""
Cons: "You have to download an app to watch movies/tv. There is no food served (transatlantic flight!) unless purchased 48 hours beforehand."
Pros: "Low cost, supportive seating"
Cons: "Meals are extra Arrived a bit early and had to wait about 15 min for someone to attach the gate"
Cons: "Plane needs to be upgraded, don't charge for meals or baggage"
Pros: "the price"
Cons: "they left late"
Pros: "Really comfortable plane"
Cons: "Slow boarding"
Cons: "They did not have hamburgers but when I called about seat reservation I was told I had order a hamburger but they weren’t even on the menu."
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"
Cons: "Very limited food choice."
Pros: "On time departure Landed earlier than expected"
Cons: "Disappointed alcohol was not complimentary like all my previous international flights."
Pros: "Great crew, comfortable seats although was unable to choose seats prior to check in."
Cons: "Got charged for bags when we had booked regular economy class, NOT economy “light”. Was told the baggage policy changed since we booked - TOTAL BS! Also, c’mon, give us ONE free beer on a 7 hour flight."
Cons: "Seat uncomfortable"
Pros: "The overall mediocre entertainment was the best part."
Cons: "Bag drop took 75 minutes waiting in a line with minimal signage. The middle seat is not designed to accommodate a small backpack, let alone, my tiny, size 5 feet. There are no snacks provided (7.5 hour flight) and NO refills on WATER!!"
Pros: "The flight was smooth and the service was great."
Cons: "Nothing to complain about"
Cons: "Surprised by very large bag fees, reservation was unclear about baggage allowance and charges."
Cons: "See above."
Cons: "I thought there would be an on flight meal with the international flight."
Pros: "Comfortable planes, nice crew, great pilots"
Cons: "No food served"
Pros: "See Above"
Cons: "See Above"
Pros: "Clean. Good service. Just way better than most domestic flights in recent memory."
Cons: "Never flee international without getting a free meal before. Pretty sad. Plus, they charged for earphonestoo. Ridiculous."
Pros: "Nice people, efficient, Good coordination of flights in Reyjavik."
Cons: "Food and seats. All airline seats are made for very tiny people. I was cramped and I'm not fat."
Pros: "On time, good service, quick boarding. Overall very good experience."
Cons: "Landing was terrible ."
Pros: "Crew was nice"
Cons: "Tight fit...herded like cattle in Iceland...barely made my connecting flight. No one available to give info on where to go or why we were delayed. Oh...and seven hour flight...no food. But pretty sunset"
Cons: "3 hour delay from Denver translated into a 6 hour delay to my final destination. Food on board is expensive, even when other airlines offer food in their ticket prices. Very likely will not fly on Iceland Air again."
Cons: "Included in previous comment"
Pros: "I liked how small the airport was in Iceland no freaking out when your plane lands and your connection is already boarding"
Cons: "There was no meal provided which was a bit of a surprise for an international flight.."
Pros: "Best airplane experience I've ever had! Great airline!"
Pros: "Non stop great service"
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: "Very comfortable seat in row 5"
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: "They dont offer a meal for free."
Cons: "My wife's bag did not make the plane from KEF to AMS. Still hasn't arrived 30 hours later."
Cons: "Depending on the seat you get (aisle, middle, or window) you either can or cannot fit anything under the seat in front of you. Each seat has different space. What I usually take wouldn't fit anywhere but the window. The middle seat space is USELESS as there is something installed that MAY give you about 6 inches from floor to it. The aisle seat's forward under space is a cube shape, so typical carry-ons won't fit there either. As I slept the whole way to Reykyavik, I don't know much about the service. The under seat space may lead me to not booking Icelandair again."
Pros: "Icelandair is great because your connection waits for you even if your flight is late."
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: "Peaceful and smooth until the landing."
Cons: "Landing quite rough."
Pros: "Very pleasant crew."
Cons: "1 of my bags was delayed accidentally."
Cons: "No blankets and the temp in the plane was freezing. Possibly this is only for this specific flight, very little info on delay and almost no info on what was going on."
Pros: "The 2nd flight waited for the delayed flight from NY which was much appreciated."
Cons: "Arrived late."
Cons: "Arrived 10 hours late, lost luggage."
Cons: "Meals on menu were not available."
Pros: "The crew was quick and kept us informed; the iPads were a pleasant surprise and a nice addition to a flight"
Cons: "No communication with passengers regarding delayed boarding and absolutely NO announcements to board. Everyone lined up and just waited until they started letting us through, so it didn't even matter what seat you got, it all depended on how close you were to the front of the line. Completely ridiculous. Keflavik Airport was too congested with no consideration given to pedestrian traffic while trying to board an entire plane. Massive jams."
Pros: "I enjoyed everything about my experience with Icelandair. I am going to be flying into London through them for now on and hopefully on an annual basis!"
Cons: "The movies were all old, no new variety. They refused to let us take our bag on to the plane even though it fit in their provided sample bin and made us check it at the gate. There was plenty of room on the plane bins and several bigger backpacks than our small duffle bag! This caused us a lot of extra time spent upon arrival waiting for it"
Cons: "you cancelled my flight, no more Iceland air for us, we had to cancel our entire vacation."
Pros: "-This was the first time flying with Icelandair and will definately fly with you again. Hot coffee was very good and so was the Yogart."
Cons: "Not having a meal available. Next time I will know to pack a sandwich."
Pros: "Folks were friendly and efficient."
Cons: "Not enough space"
Pros: "I appreciated the fact that we were able to fly out despite there being a major snow storm and closed airport just hours before our takeoff. We also appreciated being able to switch our connection flight fairly easily once we knew we would be delayed. The staff was very kind and since we had a longer layover in Keflavik, we were very grateful for the food vouchers to used in the airport while we waited."
Cons: "The airline wouldn't make a decision about whether or not the plane would be flying out on time or be delayed until about an hour before our original boarding time. Seeing as the airport and only road getting to the airport were closed, it seems like they would have been able to make that decision and alert all passengers much sooner. We kept calling in to check on the flight status and they said we would receive texts and emails with any changes, but I never did."
Pros: "Huge snowstorm in Denver caused the airport to shut down. Plane left about 5 hours late. We missed our connection and even though it wasn't Icelandic Air's fault they gave me a taxi, a room and three meals until I caught my connecting flight the next day. Amazing service."
Cons: "When you book BA and end up with Iberia, that’s definitely not what you want..."
Cons: "My checked bag did not make it to London, and it’s really affected my short stay which requires a lot of traveling around England."
Cons: "Missed my transfer in London because the plane took too long to unboard and I was unable to make it to the gates of my next flight in time, despite there being over an hour connection time. The flight came in slightly late and passports were re-inspected upon unboarding which wasted a lot of time, and Heathrow is a nightmare of an airport on a good day, which made it very difficult to get where I needed to go."
Cons: "This flight was cancelled"
Pros: "The aircraft comfort"
Cons: "Do the checking before not 15 min before the departure"
Cons: "Delayed by an hour due to inbound delay, causing a knock-on delay with plane maintenance. While fairly comfortably seated and offered water, this still was somewhat unpleasant especially after a long-haul from Havana"
Pros: "Not a lot."
Cons: "Arriving at the gate whilst the flight was still boarding, with a boarding pass in my hand, and being told that my seat had been given to someone else because the Airline unilaterally decided that my connecting flight from Bogotá would not arrive in time. Followed by two hours of Iberia staff being surly, not looking me in they eye and doing absolutely nothing about getting me home. I have now been travelling for nearly 30 hours without sleep, am stuck in Madrid with no certainty of when or how I will get home or see my luggage again, and am seriously seriously pissed off. I do accept that things can sometimes go wrong and that it is nobody’s fault. This is definitely somebody’s fault."
Pros: "Every thing was ok"
Pros: "The food was nice."
Cons: "There was no water in business class toilets. The staff are not polite."
Cons: "I was not able to check in online"
Pros: "The screens on a dozen seats just failed a few hours in - engineering issue. And breakfast was a cold pretzel. Food gets let’s generous on BA all the time. The crew were lovely."
Cons: "A 2330 Flight ran significantly late with a passenger delay and then de-icing. The repeated assurances of “a 10 minute or so delay” were obviously not correct. Takeoff close to 0100 was followed by drinks AND then food - my vote would be neither. Please oh please just let us sleep."
Pros: "Madrid's airport is comfortable and modern."
Cons: "Unless you paid you do not even get a seat assigned until you get to the airport. No food or even drink unless you pay."
Pros: "Excellent service"
Cons: "Seating and not so friendly"
Pros: "Heathrow Airport has a lot of stores to keep you occupied"
Cons: "Late notice of where our gate was located. By the time we got the news, we went to our gate and the people were already boarding"
Pros: "I like the staff and the generous host of them"
Cons: "The price was not matching the benefits of the ticket because it was without check in bag (luggage) and every single thing you have to pay The type of aircraft there are using its too small business class is very poor nothing to compare with other company."
Pros: "Crew was nice and I had a great flight with Iberia on my flight from Chicago to Madrid"
Cons: "I am 6 feet 180 pounds and I had absolutely no legroom was completely stuck in my seat can’t believe that a tourist class seat is this small with no legroom"
Pros: "That I arrived"
Cons: "Iberia flight was delayed by 45 minutes causing me to miss my connection from London to Dublin."
Pros: "Airbus 320"
Cons: "Boarding process and pitiful legroom space . Iberia clearly loves showing the privileged few who have paid top dollars to be at the front , that we must be made to wait and struggle to get to our seats .Then, we have to squeeze into a tiny , pitiful space of a seat .....Even Ryanair does better !"
Pros: "seat is comfort"
Pros: "Flight was safe, aircraft was clean and luckily with enough room under the seat to store carry on bag"
Cons: "The fact that all the passengers boarding in "group 3" were forced to check in their carry-on bags if they did not fit under the seat; and retrieve those at the baggage claim area (not right after exiting the airplane) In my case I was able to store my carryon under the seat in front of me after pleading to the crew and gate members to let me try because of my connecting flights. There is no complimentary food service, even water is charged."
Cons: "I stopped at the Iberia check-in at Barajas in Madrid. They sent me to BA check-in, where I waited 45 minutes to find out that I should be at Iberia check-in. Then, Iberia check-in had to send me to last minute clerk or I would have missed my flight. Last minute check-in ended up being the same place and same clerk I began with."
Cons: "A porter checked our bags at the gate without asking us whether we were traveling beyond London, so the bags were never transferred to the transatlantic flight nor did they arrive in SF. It wasn't necessary to check them because there was plenty of room in the overhead bins when we got on the flight. We immediately asked a flight attendant to help when I realized they might not go through and he said he spoke to someone who caught and tagged the bags to go through, but it still didn't happen. It would have been easier if he had just brought them to us on the plane. Another women's bag was taken with all her baby supplies and bottles in it for a 16-hour travel day. Very frustrating for all of us."
Cons: "Mistake Kayak or its subcontractor made in listing the name of my wife incorrectly. This created a real hassle in getting a boarding pass in her name"
Pros: "short flight, on time"
Cons: "indifferent crew"
Pros: "The flight was short"
Cons: "They didn't even give out water on the flight. Not to happy with the service"
Cons: "There was no complimentary water or beverages"
Cons: "Very pleased with overall service and hospitality"
Pros: "Flight on time"
Cons: "Check in was terrible, did no allow online and on the desk a lot of misinformation which sent me to different desks for check in. Personnel Needs training!!l"
Cons: "Upon boarding the aircraft was really hot, I was sweating in my seat... I did not receive any complementary drinks or snacks."
Pros: "Movies, no delays"
Cons: "Luggage was not documented correctly to my final destination by Iberia"
Cons: "Very limited room to move. Rather impersonal"
Pros: "Comfortable flights & on time"
Cons: "Service, flight crew seemed to busy chatting instead of serving."
Cons: "They forced us to check our bags at the gate even though we had an international connection to make in London--to continue flying to Chicago. As a result, we had to go through customs and security in London, and would have most definitely missed our connecting flight back home to the States if not for a woman in customs at Heathrow who let us cut to the front of the line. I will never fly Iberia again and will be lodging a formal complaint."
Cons: "No free snacks or drinks"
Pros: "Easy check in and comfortable seats"
Cons: "Too little time to connect with another flight at Heathrow. Missed my connecting flight. Why is there an additional security checkpoint at Heathrow when you've already been thru security at another airport? Poor design for international arrivals."
Pros: "The ease at putting my luggage in.."
Cons: "The prices of the food and drinks!! Ripped off!!"
Pros: "Short 2 hour hop to Heathrow, adequate seating, nothing challenging about this flight. Barcelona airport is very user friendly, open and expansive. Service was good on the flight."
Cons: "Landed at heathrow, which is a sprawling airport and plenty of time required for the endless walking, bussing, and subway connections between terminals and gates. But efficient."
Pros: "We were overall very pleased with everything about, thank you!"
Pros: "The crew was fabulous! And the ride was on time and had plenty of entertainment."
Cons: "My only complaint is that the seats were very tight in the economy class. We were packed like cattle. I know these were the "cheap" seats but for almost $1500 I would hope for a bit more comfort."
Cons: "Kept us waiting for five hours"
Cons: "Late departure."
Pros: "Guests were boarded quickly. Crew was friendly."
Cons: "Food was tasteless and bland. Crew was not very attentive."
Cons: "The seat did not recline, a bit ridiculous for a plane that size"
Cons: "The fight from Chicago to London was a nightmare."
Pros: "Loved the gluten free meal option."
Pros: "Spaciousness of aircraft, comfort of aircraft (vibration, noise)"
Cons: "not enough leg room. and i have to point out that I am a petite 110 lbs, 5'2" woman. although the flight is short, a complimentary snack and drink would have been nice. instead, you had to pay for anything you wanted. prices on top of that, were exaggerated. very disappointing."
Pros: "The flight from Raleigh to Heathrow London was LONG, so I especially enjoyed the wine being included without extra cost! Wine helped me to relax, read, & survive the long sleepless night!"
Airlines flying from Colorado to London have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.
Daily cleaning, installation of cabin HEPA filters on flights from Colorado to London
Masks required on board, masks provided on flights from Colorado to London
Social distancing seating
Middle seats unavailable to book on flights from Colorado to London
Testing for antibodies, testing for symptoms for flights from Colorado to London
Waiving of change fees. Search flexible flights from Colorado to London