Trips

Find Cheap Flights from Denver International to London Heathrow (DEN - LHR)

Search hundreds of travel sites at once for deals on flights to London Heathrow

Depart
Return
Any month
Compare vs. KAYAK |

Denver International to London Heathrow Flight Information

Avg. Flight Duration 9h 27m
Flights Arrive in London Heathrow
Flights Depart from Denver International
Flight Price $377
Distance 4,659 miles
Airlines Icelandair, Finnair, British Airways, Air Canada

Good to Know

Average Price:
$623
(avg. price over the last 2 weeks)
Good Deal:
$553
or less (round trip)

When to Book Flights from Denver International to London Heathrow

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $553 or less.
Book at least 1 week before departure in order to get a below-average price.
Morning departure is around 18% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Denver International to London Heathrow Flights

How long does a flight from Denver International to London Heathrow take?
An average nonstop flight takes 9h 00m, covering a distance of 4659 miles.
How many flights are there between Denver International and London Heathrow?
There are 94 (nonstop) flights between Denver International and London Heathrow per week, averaging 12 per day.
Which airlines provide the cheapest flights from Denver International to London Heathrow?
In the past 3 days, the cheapest round-trip tickets were found on Icelandair ($377), Finnair ($480) and British Airways ($484).
Do I need a passport to fly between Denver International and London Heathrow?
Yes.
Which airlines fly most frequently between Denver International and London Heathrow?
American Airlines (1 times daily), Air Canada (1 times daily), Aer Lingus (1 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Denver International to London Heathrow?
For Denver International to London Heathrow, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from London Heathrow back to Denver International, the best deals are generally found on Saturday, with Saturday being the most expensive.

Book cheap flights from Denver International to London Heathrow (round-trip)

Airports
Origin
Denver
$377
only
$377
Destination
London
$377
only
$377
Mon, Feb 18
DEN
Denver International
LHR
London Heathrow
12h 15m
Fri, Mar 1
LHR
London Heathrow
DEN
Denver International
12h 55m
Trip: 12 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
KEF
SEA
Good 6.0

Stewards were upbeat

Cramped for 7+ hours

ZRH
KEF
Mediocre 2.0

Late flight. Both flights smelled of latrines. Charge for one checked back one way was 99.00. Flight attendant rude and said no vegetarian meals were available to purchase and I ordered within 10 mins of taking off. First she ignored me, even though she was talking to passenger next to me. I waited and she skipped right over me to next row. I had to press overhead light to get her attention. No veggie wrap available and I was told the vegetarian soup actually had chicken. No food is available otherwise on Iceland air flights. We almost missed our connection and flight crew didn’t even let us off plane before others who didn’t have tight connection. Husband was assigned a seat that didn’t exist on plane. Landing was the worst ever, came in on two wheels—all passengers were groaning. I travel a lot and will never choose Iceland air again.

KEF
ANC
Good 7.2

The flight was comfortable and the cabin crew attentive. The 7-hour flight time can't be beat. Free checked bag. On this occasion, the boarding in Reykjavik was through a jetway so you weren't exposed to the weather, though that's not always true.

Even using a jetway, boarding in Reykjavik is ridiculous, with inadequate seating and lots of standing around in confusing lines. They had four US/Canada flights leaving within 10 minutes, with the gates 10 feet apart and about 600 passengers jammed in four lines running through the concourse.

DEN
KEF
Excellent 10.0

Nice flight. Empty seat between the two of us! Arrived earlier than expected.

Nothing.

KEF
ORD
Good 6.6

Entertainment system with responsive touch screens, good sound and lots of choices. Flight on time. Professional crew.

Limited food selection (all food cost extra) and food was mediocre. Boarding in Reykjavik was slow and not well organized. While the crew hands out small water bottles upon boarding, more water should be offered during a long flight.

Tue, Dec 4
DEN
Denver International
LHR
London Heathrow
9h 00m
Wed, Dec 12
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 9 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 15 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
ORD
HEL
Mediocre 2.0

Good airline teamed up with crappy American brings them down. Don't waste money!!

DEN
LHR
Okay 5.3

British airways offers amazing entertainment selections on the Screens over 25, food was good

Check in line was terrible, I had checked in online but still waited over a hour to bag drop, service was not great either the flight attendants were not happy at thier job..

DEN
LHR
Excellent 9.0

The crew made the entertainment free because of the delay. They were very hard working to make things right.

Plane was late at Fenver and Heathrow and into Geneva. Plane seating was uncomfortable for such a long flight. This is an airline issue not specifically BA/Finnair.

DEN
LHR
Excellent 9.0

Big plane lots of room

Checking in was not good. The flight was booked by Finnair but because the carrier was BA I had to get the BA number and call BA to check in. It worked out but took a lot of calls.

DEN
LHR
Excellent 10.0

customer service was attentive smart yet caring.

Tue, Oct 16
DEN
Denver International
LHR
London Heathrow
9h 00m
Thu, Nov 1
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 17 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Excellent 8.3

On board service and amenities

Kayak customer service

DEN
LHR
Good 6.0

The crew was friendly.

The flight was over two hours late. No USB ports for electronics. Leg room and seats were dismal.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

DEN
LHR
Okay 5.0

Simple. Arrived (late) to my destination(s) in one piece. Pleasant flight crew.

Expected more for my money...In flight services (movies) screens were very small and hard to see. No charging outlets for phones. Flights were delayed. No sense of urgency mentality? (Don’t get me started on the London airport experience).

DEN
LHR
Excellent 10.0

They were extremely accommodating.

N/A

Tue, Nov 20
DEN
Denver International
LHR
London Heathrow
20h 20m
Mon, Nov 26
LHR
London Heathrow
DEN
Denver International
31h 45m
Trip: 7 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 22,987 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.5
YVR
HKG
Good 7.6

Ran out of the best meal option in Business Class...

YYC
YYZ
Excellent 8.0

Early flight was not as crowded

But was very busy just the same. Weather was poor

YVR
DUB
Okay 5.6

Crew were nice, food on board was ok Given the long wait time at immigration, we did not have to wait for our bags.

Rouge seats are notoriously uncomfortable, especially on a 9 hour flight. Rouge Player entertainment sucks, very poor movie selection. Irish immigration took 45 minutes... a ridiculous amount of time in this day and age. My time with the officer took about 30 seconds, so obviously the problem is that they are understaffed...not the best way to start your trip to Ireland after a long flight!

VCE
YYZ
Good 7.6

One flight attendant in particular. Wish I knew her name to commend her. Also, had a bassinet for my grandson!! Frequent beverages offered, especially water. Allowed to move seats once in the air!! Able to help my daughter with her baby. Chicken dish was actually really good.

No movie screens at all!? Odd; especially for an International flight. Check bathroom paper supplies more frequently. Ran out of paper towels two bathrooms. No fault of yours, but the Venice airport was a nightmare. I am use to airports in the US and was shocked how long the line was to get through to our gate. We couldn’t even find the end because it wrapped around like an “S”. Surprised we had to print our boarding pass (but was never asked for it); couldn’t do a mobile boarding pass.

YVR
EWR
Excellent 9.3

Great plane B 787

Paid online for food and most choices gone Overpriced

Sun, Feb 3
DEN
Denver International
LHR
London Heathrow
12h 15m
Thu, Feb 14
LHR
London Heathrow
DEN
Denver International
12h 55m
Trip: 12 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
ZRH
KEF
Mediocre 2.0

Late flight. Both flights smelled of latrines. Charge for one checked back one way was 99.00. Flight attendant rude and said no vegetarian meals were available to purchase and I ordered within 10 mins of taking off. First she ignored me, even though she was talking to passenger next to me. I waited and she skipped right over me to next row. I had to press overhead light to get her attention. No veggie wrap available and I was told the vegetarian soup actually had chicken. No food is available otherwise on Iceland air flights. We almost missed our connection and flight crew didn’t even let us off plane before others who didn’t have tight connection. Husband was assigned a seat that didn’t exist on plane. Landing was the worst ever, came in on two wheels—all passengers were groaning. I travel a lot and will never choose Iceland air again.

KEF
ANC
Good 7.2

The flight was comfortable and the cabin crew attentive. The 7-hour flight time can't be beat. Free checked bag. On this occasion, the boarding in Reykjavik was through a jetway so you weren't exposed to the weather, though that's not always true.

Even using a jetway, boarding in Reykjavik is ridiculous, with inadequate seating and lots of standing around in confusing lines. They had four US/Canada flights leaving within 10 minutes, with the gates 10 feet apart and about 600 passengers jammed in four lines running through the concourse.

CPH
KEF
Excellent 10.0

This is one of the best airlines I've ever flown. Very nice comfortable planes. Excellent air crew. Everything they do is at a high standard. What really sets them apart is the really great service. I had a problem with WOW air not honoring my ticket due to snow. I had to book at the airport on Iceland air last minute. They didn't have a gate agent who could sell me a ticket - so they sent a manager out from the back office to book us so we would not be stranded due to WOW's incompetence. Booked us just minutes before take off, escorted us through security and onto the plane. Start to finish less than 30 minutes. Amazing service. Their class of service is far above that of major carriers. Iceland Air works harder and makes sure everything is right.

DEN
KEF
Excellent 10.0

Nice flight. Empty seat between the two of us! Arrived earlier than expected.

Nothing.

LHR
KEF
Excellent 10.0

We did not fly Icelandair since our flight was cancelled but they took excellent care in booking us on another airline and all worked out. Icelandair has excellent customer service!

Sun, Mar 3
DEN
Denver International
LHR
London Heathrow
20h 55m
Tue, Mar 12
LHR
London Heathrow
DEN
Denver International
28h 35m
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
ZRH
KEF
Mediocre 2.0

Late flight. Both flights smelled of latrines. Charge for one checked back one way was 99.00. Flight attendant rude and said no vegetarian meals were available to purchase and I ordered within 10 mins of taking off. First she ignored me, even though she was talking to passenger next to me. I waited and she skipped right over me to next row. I had to press overhead light to get her attention. No veggie wrap available and I was told the vegetarian soup actually had chicken. No food is available otherwise on Iceland air flights. We almost missed our connection and flight crew didn’t even let us off plane before others who didn’t have tight connection. Husband was assigned a seat that didn’t exist on plane. Landing was the worst ever, came in on two wheels—all passengers were groaning. I travel a lot and will never choose Iceland air again.

FRA
KEF
Mediocre 2.0

Nothing

All the hidden charges. My good deal turned out to be worst deal EVER. I paid extra for my my seat and got bump from my seat to a middle seat. Icelandair attitude suck about the whole thing too and could careless too. After this I don't even want to go to Iceland or have the Kayak app on my phone. Kayak and Icelandair, will do everything to let everyone know how miserable you made my vacation.

KEF
SEA
Mediocre 2.0

Icelandair attitude suck and is the reason I will not even visit Iceland now.

CPH
KEF
Excellent 10.0

This is one of the best airlines I've ever flown. Very nice comfortable planes. Excellent air crew. Everything they do is at a high standard. What really sets them apart is the really great service. I had a problem with WOW air not honoring my ticket due to snow. I had to book at the airport on Iceland air last minute. They didn't have a gate agent who could sell me a ticket - so they sent a manager out from the back office to book us so we would not be stranded due to WOW's incompetence. Booked us just minutes before take off, escorted us through security and onto the plane. Start to finish less than 30 minutes. Amazing service. Their class of service is far above that of major carriers. Iceland Air works harder and makes sure everything is right.

ARN
KEF
Good 7.6

On time - very important since we had an extremely tight connection. Crew was professional and efficient.

Only free drinks are tea, coffee and water.

Sun, Sep 30
DEN
Denver International
LHR
London Heathrow
43h 05m
Sun, Oct 7
LHR
London Heathrow
DEN
Denver International
64h 25m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Oct 30
DEN
Denver International
LHR
London Heathrow
9h 00m
Tue, Nov 6
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Excellent 10.0

They were extremely accommodating.

N/A

DEN
LHR
Good 7.0

The seat was comfortable and featured the good headrests.

Food was inedible so I left it. The sound on the movies was tinny making hearing difficult.

DEN
LHR
Mediocre 2.0

Our flight from Denver to London was canceled at the last minute last night. The information from your email and the number given from you notifying me of the cancellation only gave British Airway to contact for redress. It took over an hour on the phone to get another flight which was 2 days later with now 2 days less of our vacation. Not to mention the loss of 2 hotel room payments. Kayak was of no help in this matter. Plus our flight reservation prohibited us from getting our flight on another flight the next day. If I had known that I never would have used Kayak. I am extremely unhappy with how this was handled. I expect to be reimbursed for our lost Hotel room costs and the costs associated with lost tours from you. Please contact me with how you will go about doing this.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

DEN
LHR
Good 6.6

I like to fly BA because the crews ( and I assume the maintenance) are top notch

Tired old 747. Needs an upgrade. Packed in like sardines on an old plane that shows it age. Should have flown Norwegian. Major delay caused me to miss my connections though the BA staff were all over it.

Thu, Nov 29
DEN
Denver International
LHR
London Heathrow
9h 00m
Sat, Dec 8
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 10 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 15 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
DEN
LHR
Mediocre 2.0

It is absolutely ridiculous that they made us pay $100 each way for our ski bag/equipment. I will never fly either airline again. Horrible customer service as well. The airplane and its entertainment system is quite antiquated and needs to be updated. Horrible experience.

ORD
HEL
Mediocre 2.0

Good airline teamed up with crappy American brings them down. Don't waste money!!

ICN
HEL
Good 7.3

The food wasn’t good and it would be great if they had pasta or some vegetarian option.

DEN
LHR
Excellent 10.0

customer service was attentive smart yet caring.

HEL
JFK
Good 6.0

it was on time

it was a poor food choice again.

Sun, Jan 13
DEN
Denver International
LHR
London Heathrow
12h 15m
Sun, Jan 20
LHR
London Heathrow
DEN
Denver International
12h 55m
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
CPH
KEF
Excellent 10.0

This is one of the best airlines I've ever flown. Very nice comfortable planes. Excellent air crew. Everything they do is at a high standard. What really sets them apart is the really great service. I had a problem with WOW air not honoring my ticket due to snow. I had to book at the airport on Iceland air last minute. They didn't have a gate agent who could sell me a ticket - so they sent a manager out from the back office to book us so we would not be stranded due to WOW's incompetence. Booked us just minutes before take off, escorted us through security and onto the plane. Start to finish less than 30 minutes. Amazing service. Their class of service is far above that of major carriers. Iceland Air works harder and makes sure everything is right.

KEF
ANC
Good 7.2

The flight was comfortable and the cabin crew attentive. The 7-hour flight time can't be beat. Free checked bag. On this occasion, the boarding in Reykjavik was through a jetway so you weren't exposed to the weather, though that's not always true.

Even using a jetway, boarding in Reykjavik is ridiculous, with inadequate seating and lots of standing around in confusing lines. They had four US/Canada flights leaving within 10 minutes, with the gates 10 feet apart and about 600 passengers jammed in four lines running through the concourse.

KEF
IAD
Good 7.2

the plane and crew

the chaos at KEV

KEF
SEA
Good 6.0

Stewards were upbeat

Cramped for 7+ hours

DEN
KEF
Excellent 10.0

Nice flight. Empty seat between the two of us! Arrived earlier than expected.

Nothing.

Sun, Nov 4
DEN
Denver International
LHR
London Heathrow
9h 00m
Thu, Nov 15
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Mediocre 2.3

Nothing

Entertainment and food were terrible. Plane was filthy and ancient. Crew was inattentive and we were treated poorly for bringing a child’s seat on the plane. It was hot the entire 9 hour flight. I will pay extra not to fly BA again.

DEN
LHR
Good 6.3

I arrived safe and sound

Even though I purchased an exit row seat we were packed in like sardines. I know airlines have to make money but that flight was ridiculous. also, the plane was way too warm for much of the flight. Not sure if there was a problem with the air but for these prices...fix it please.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

DEN
LHR
Good 6.0

The crew was friendly.

The flight was over two hours late. No USB ports for electronics. Leg room and seats were dismal.

DEN
LHR
Good 6.6

I like to fly BA because the crews ( and I assume the maintenance) are top notch

Tired old 747. Needs an upgrade. Packed in like sardines on an old plane that shows it age. Should have flown Norwegian. Major delay caused me to miss my connections though the BA staff were all over it.

Fri, Nov 9
DEN
Denver International
LHR
London Heathrow
9h 00m
Sat, Nov 17
LHR
London Heathrow
DEN
Denver International
15h 25m
Trip: 9 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 15 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
DEN
LHR
Good 7.6

Good Entertainment, and I had an empty seat next to me. Crew was attentive.

My luggage was lost when I got to Paris and the staff at the ticket booth in Denver were not aware that my final destination was Paris.

DEN
LHR
Mediocre 2.0

It is absolutely ridiculous that they made us pay $100 each way for our ski bag/equipment. I will never fly either airline again. Horrible customer service as well. The airplane and its entertainment system is quite antiquated and needs to be updated. Horrible experience.

ORD
HEL
Excellent 8.0

The flight was not crowded and that was a nice surprise for a transatlantic flight. Each passenger was offered a personal bottle of water upon boarding, cabin crew was very nice and professional. The flight was on time and we arrived at the airport of destination even ahead of time!

There was no soap in the toilet...

DEN
LHR
Excellent 9.0

The crew made the entertainment free because of the delay. They were very hard working to make things right.

Plane was late at Fenver and Heathrow and into Geneva. Plane seating was uncomfortable for such a long flight. This is an airline issue not specifically BA/Finnair.

ICN
HEL
Good 7.3

The food wasn’t good and it would be great if they had pasta or some vegetarian option.

Sat, Dec 1
DEN
Denver International
LHR
London Heathrow
9h 00m
Sun, Dec 9
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

DEN
LHR
Okay 5.0

The plane wasn't full, so there was an empty seat in-between my aisle and their window, as well as open spots throughout the plane.

Plane was delayed several times. Website wasn't clear about what time to show up to the airport. Food was served late and was mediocre.

DEN
LHR
Excellent 10.0

They were extremely accommodating.

N/A

DEN
LHR
Excellent 8.3

On board service and amenities

Kayak customer service

DEN
LHR
Mediocre 2.3

Nothing

Entertainment and food were terrible. Plane was filthy and ancient. Crew was inattentive and we were treated poorly for bringing a child’s seat on the plane. It was hot the entire 9 hour flight. I will pay extra not to fly BA again.

Tue, Jan 8
DEN
Denver International
LHR
London Heathrow
9h 00m
Wed, Jan 16
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Good 6.6

I like to fly BA because the crews ( and I assume the maintenance) are top notch

Tired old 747. Needs an upgrade. Packed in like sardines on an old plane that shows it age. Should have flown Norwegian. Major delay caused me to miss my connections though the BA staff were all over it.

DEN
LHR
Good 6.3

I arrived safe and sound

Even though I purchased an exit row seat we were packed in like sardines. I know airlines have to make money but that flight was ridiculous. also, the plane was way too warm for much of the flight. Not sure if there was a problem with the air but for these prices...fix it please.

DEN
LHR
Okay 5.3

Service is good, people are friendly. Efficient. Keep you up to date with changes.

No complimentary beverages. Not even water. Baggage did not make it.

DEN
LHR
Okay 5.0

The plane wasn't full, so there was an empty seat in-between my aisle and their window, as well as open spots throughout the plane.

Plane was delayed several times. Website wasn't clear about what time to show up to the airport. Food was served late and was mediocre.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

Wed, Mar 13
DEN
Denver International
LHR
London Heathrow
9h 00m
Wed, Mar 27
LHR
London Heathrow
DEN
Denver International
9h 55m
Trip: 15 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Okay 5.3

Service is good, people are friendly. Efficient. Keep you up to date with changes.

No complimentary beverages. Not even water. Baggage did not make it.

DEN
LHR
Good 6.0

The crew was friendly.

The flight was over two hours late. No USB ports for electronics. Leg room and seats were dismal.

DEN
LHR
Excellent 10.0

They were extremely accommodating.

N/A

DEN
LHR
Okay 5.0

The plane wasn't full, so there was an empty seat in-between my aisle and their window, as well as open spots throughout the plane.

Plane was delayed several times. Website wasn't clear about what time to show up to the airport. Food was served late and was mediocre.

DEN
LHR
Good 6.3

I arrived safe and sound

Even though I purchased an exit row seat we were packed in like sardines. I know airlines have to make money but that flight was ridiculous. also, the plane was way too warm for much of the flight. Not sure if there was a problem with the air but for these prices...fix it please.

Wed, Nov 28
DEN
Denver International
LHR
London Heathrow
12h 15m
Sun, Dec 2
LHR
London Heathrow
DEN
Denver International
12h 55m
Trip: 5 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
ARN
KEF
Good 7.6

On time - very important since we had an extremely tight connection. Crew was professional and efficient.

Only free drinks are tea, coffee and water.

KEF
IAD
Good 7.2

the plane and crew

the chaos at KEV

FRA
KEF
Mediocre 2.0

Nothing

All the hidden charges. My good deal turned out to be worst deal EVER. I paid extra for my my seat and got bump from my seat to a middle seat. Icelandair attitude suck about the whole thing too and could careless too. After this I don't even want to go to Iceland or have the Kayak app on my phone. Kayak and Icelandair, will do everything to let everyone know how miserable you made my vacation.

KEF
SEA
Good 6.0

Stewards were upbeat

Cramped for 7+ hours

LHR
KEF
Excellent 10.0

We did not fly Icelandair since our flight was cancelled but they took excellent care in booking us on another airline and all worked out. Icelandair has excellent customer service!

Sat, Mar 23
DEN
Denver International
LHR
London Heathrow
12h 35m
Tue, Apr 2
LHR
London Heathrow
DEN
Denver International
9h 50m
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Excellent 10.0

They were extremely accommodating.

N/A

DEN
LHR
Mediocre 2.3

Nothing

Entertainment and food were terrible. Plane was filthy and ancient. Crew was inattentive and we were treated poorly for bringing a child’s seat on the plane. It was hot the entire 9 hour flight. I will pay extra not to fly BA again.

DEN
LHR
Okay 5.3

Service is good, people are friendly. Efficient. Keep you up to date with changes.

No complimentary beverages. Not even water. Baggage did not make it.

DEN
LHR
Good 7.0

The seat was comfortable and featured the good headrests.

Food was inedible so I left it. The sound on the movies was tinny making hearing difficult.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

Fri, Dec 7
DEN
Denver International
LHR
London Heathrow
9h 00m
Sun, Dec 16
LHR
London Heathrow
DEN
Denver International
29h 53m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 144 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
DEN
LHR
Okay 5.0

The plane wasn't full, so there was an empty seat in-between my aisle and their window, as well as open spots throughout the plane.

Plane was delayed several times. Website wasn't clear about what time to show up to the airport. Food was served late and was mediocre.

DEN
LHR
Okay 5.0

Simple. Arrived (late) to my destination(s) in one piece. Pleasant flight crew.

Expected more for my money...In flight services (movies) screens were very small and hard to see. No charging outlets for phones. Flights were delayed. No sense of urgency mentality? (Don’t get me started on the London airport experience).

DEN
LHR
Mediocre 2.3

Nothing

Entertainment and food were terrible. Plane was filthy and ancient. Crew was inattentive and we were treated poorly for bringing a child’s seat on the plane. It was hot the entire 9 hour flight. I will pay extra not to fly BA again.

DEN
LHR
Mediocre 2.0

Our flight from Denver to London was canceled at the last minute last night. The information from your email and the number given from you notifying me of the cancellation only gave British Airway to contact for redress. It took over an hour on the phone to get another flight which was 2 days later with now 2 days less of our vacation. Not to mention the loss of 2 hotel room payments. Kayak was of no help in this matter. Plus our flight reservation prohibited us from getting our flight on another flight the next day. If I had known that I never would have used Kayak. I am extremely unhappy with how this was handled. I expect to be reimbursed for our lost Hotel room costs and the costs associated with lost tours from you. Please contact me with how you will go about doing this.

DEN
LHR
Okay 5.0

it was very clean on a board.

even water for money

Sat, Sep 22
DEN
Denver International
LHR
London Heathrow
27h 47m
Mon, Oct 1
LHR
London Heathrow
DEN
Denver International
32h 22m
$1061
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Sep 26
DEN
Denver International
LHR
London Heathrow
20h 20m
Tue, Oct 2
LHR
London Heathrow
DEN
Denver International
27h 47m
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 7,773 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
KEF
BOS
Excellent 10.0

Great planes. Great air crew. Great ground staff. Seats are large and comfortable. Crew does a great job of making sure you have what you need. Extremely attentive and professional. Gate agents are friendly and knowledgeable. They work hard to solve any problems you have - even if you're not and Iceland Air customer. I can't say enough good things about them. You can't go wrong flying Iceland Air.

ARN
KEF
Good 7.6

On time - very important since we had an extremely tight connection. Crew was professional and efficient.

Only free drinks are tea, coffee and water.

LHR
KEF
Excellent 10.0

We did not fly Icelandair since our flight was cancelled but they took excellent care in booking us on another airline and all worked out. Icelandair has excellent customer service!

KEF
ANC
Good 7.2

The flight was comfortable and the cabin crew attentive. The 7-hour flight time can't be beat. Free checked bag. On this occasion, the boarding in Reykjavik was through a jetway so you weren't exposed to the weather, though that's not always true.

Even using a jetway, boarding in Reykjavik is ridiculous, with inadequate seating and lots of standing around in confusing lines. They had four US/Canada flights leaving within 10 minutes, with the gates 10 feet apart and about 600 passengers jammed in four lines running through the concourse.

FRA
KEF
Mediocre 2.0

Nothing

All the hidden charges. My good deal turned out to be worst deal EVER. I paid extra for my my seat and got bump from my seat to a middle seat. Icelandair attitude suck about the whole thing too and could careless too. After this I don't even want to go to Iceland or have the Kayak app on my phone. Kayak and Icelandair, will do everything to let everyone know how miserable you made my vacation.

Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.

Forgot password?

Enter the email associated with your account in the field below and we'll email you a link to reset your password.

Cancel