Find Cheap Flights from Washington to Denver International

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Wed 2/21
Wed 2/28
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Book cheap flights from Washington to Denver International (round-trip)

Airports
Origin
Seattle
$82
only
$82
Destination
Denver
$82
only
$82
Mon, May 14
SEA
DEN
2h 49m
Wed, Jun 13
DEN
SEA
2h 57m
Trip: 31 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 2.3

Dirty plane. Tight quarters. Mismanaged time. Unorganized. Not worth the 20 dollar discount in comparison to other airlines that have more comfort and don't charge an outlandish amount for a carry on. It was my first time flying Frontier, and needless to say I was incredibly disappointed. Loaded onto the plane until we were supposed to take off, then deplaned for what they said would be an hour of required maintenance (which I don't know why they didn't take care of ahead of time), turned into 3 plus hours. And they can't even offer a complimentary beverage? Unimpressed, all around.

SEA
DEN
Excellent 8.0

Great flight attendants, amazing landing in Denver.

It was delayed. But I appreciated the meal voucher and voucher for future travel.

SEA
DEN
Excellent 8.6

boarding/unboarding is painless and enjoyable and attendants are respectfull

snacks and cokes are charged

SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

SEA
DEN
Mediocre 3.6

Crew was entertaining

Second most uncomfortable plane I've ever been on. Most uncomfortable was the frontier transfer directly after.

Wed, Mar 7
SEA
DEN
2h 38m
Wed, Mar 14
DEN
SEA
2h 59m
Trip: 7 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 85 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
SEA
DEN
Good 6.0

The flight

The time

SEA
DEN
Okay 4.0

My bagoal was pretty badly handled and caused damage that needs to be replaced. Third time flying with United where something like this has gone wrong. I won't be flying this airline again.

SEA
DEN
Okay 4.3

Nice customer service

Flight was delayed 5hrs because there was no plane available to take us to our designation. Only flown united 2 other times and similar things happened on those flights as well. Definitly won't be booking with united again

SEA
DEN
Good 7.0

I liked the legroom of Economy Plus. The flight itself was good. Didn't buy any food.

We arrived late in Denver and had to sit at the gate and wait for the jetway person to arrive and connect the jetway to the plane. I also didn't like the fact that I had to buy Economy Plus because my wife and I were not only not assigned seats together after booking, we were not assigned seats at all. When I booked the flights I was only allowed to choose seats for the first flight - Charlotte to Houston...but not for the other three legs of our Charlotte to Seattle trip. The only two seats together from Houston to Seattle were in the very last row. And, on our return flight we had to purchase Economy Plus in order to sit together.

SEA
DEN
Good 7.0

Failed to put my bag on the flight even with ample preflight time, simply irritating

Wed, Apr 4
SEA
DEN
2h 37m
Tue, Apr 10
DEN
SEA
3h 08m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Mar 6
SEA
DEN
2h 48m
Tue, Mar 13
DEN
SEA
3h 09m
Trip: 7 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
SEA
DEN
Good 6.3

I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome.

Tiny old plane, props blocked my window view, no entertainment system.

SLC
RAP
Excellent 8.6

Crowded boarding area, but no standing around for long. Quick boarding. Entertainment not available so can't rate that. Good crew

SEA
DEN
Excellent 10.0

The staff of the flight were very friendly and attentive. They were great!

ATL
DCA
Good 6.6

The movie availability was very much appreciated.

Although my TSA Pre check number was on my flight coming into Atlanta, it wss not on my fight leaving Atlanta. That caused me to arrive at my gate 5 mins before boarding time and prevented me from having time to eat breakfast before my flight.

ATL
SLC
Excellent 10.0

Quick boarding for a big plane. Lots of room for overhead luggage. Two beverage services. Nice crew!

Fri, Mar 9
SEA
DEN
2h 41m
Tue, Mar 13
DEN
SEA
2h 58m
Trip: 4 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 2.3

Dirty plane. Tight quarters. Mismanaged time. Unorganized. Not worth the 20 dollar discount in comparison to other airlines that have more comfort and don't charge an outlandish amount for a carry on. It was my first time flying Frontier, and needless to say I was incredibly disappointed. Loaded onto the plane until we were supposed to take off, then deplaned for what they said would be an hour of required maintenance (which I don't know why they didn't take care of ahead of time), turned into 3 plus hours. And they can't even offer a complimentary beverage? Unimpressed, all around.

SEA
DEN
Mediocre 3.3

Good connection, timely departure, pleasant crew

Budget airline ended up being much more expensive than my usual airlines. $40 per bag per leg of the trip, including carry-on?! My wife and I each had one carry on bag (normally free). Since we had a connection each direction that's $40 x 2 (people) x 4 flights = $320. That's ridiculous. Furthermore, these were the worst seating conditions on any airline I've ever seen (and I fly plenty). There is no headrest - the seats barely make it to my shoulders. And the seats themselves have no cushion whatsoever. The tray tables are laughably miniscule - much smaller than my laptop. There is no free snack/beverage or in-flight entertainment. There is no wifi. I will stick to United or Delta in the future.

SEA
DEN
Mediocre 2.6

hmm

layover nothing was in order staff sucked yall kept moving gate yall could at lest give us a soda for the long rides

SEA
DEN
Mediocre 2.0

Not a single thing

Staff is rude and incompetent, they way over charged my account for for services that weren’t even available but wasn’t told this until after they charged my card. Seriously considering taking my experience with them to local news outlets so this doesn’t happen to anyone else !!

SEA
DEN
Excellent 8.6

boarding/unboarding is painless and enjoyable and attendants are respectfull

snacks and cokes are charged

Tue, Mar 20
SEA
DEN
2h 37m
Wed, Mar 28
DEN
SEA
3h 03m
Trip: 9 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 85 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
SEA
DEN
Good 7.6

No power in seats, no in-flight TV/movie without paying, but a short enough flight it was okay.

SEA
DEN
Good 7.0

I liked the legroom of Economy Plus. The flight itself was good. Didn't buy any food.

We arrived late in Denver and had to sit at the gate and wait for the jetway person to arrive and connect the jetway to the plane. I also didn't like the fact that I had to buy Economy Plus because my wife and I were not only not assigned seats together after booking, we were not assigned seats at all. When I booked the flights I was only allowed to choose seats for the first flight - Charlotte to Houston...but not for the other three legs of our Charlotte to Seattle trip. The only two seats together from Houston to Seattle were in the very last row. And, on our return flight we had to purchase Economy Plus in order to sit together.

SEA
DEN
Excellent 10.0

Sat by united pilot who was just on flight to go to training and was with my 10 mo old daughter and was absolutley wonderful, so helpful and Im sure it was not an ideal situation for him. On second flight we sat next to flight attendant and a trainee and made our first flight trip... that could have been awful great! Big thanks to all the staff.

SEA
DEN
Okay 5.0

Delay in connecting flight from Seattle to Denver caused us to board our plane to Grand Rapids moments before the doors closed. Had we missed our flight, an unpaid work day would have incurred as we would not have arrived in Grand Rapids until the following afternoon.

SEA
DEN
Okay 4.3

Nice customer service

Flight was delayed 5hrs because there was no plane available to take us to our designation. Only flown united 2 other times and similar things happened on those flights as well. Definitly won't be booking with united again

Tue, Apr 10
SEA
DEN
2h 38m
Sat, Apr 14
DEN
SEA
3h 05m
Trip: 5 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

SEA
DEN
Good 7.3

They had us pay 45 dollars per carry on bag. CARRY ON BAG..... I was very disappointed. Who does this? I guess frontier. Won't be flying with them again.

SEA
DEN
Mediocre 2.6

hmm

layover nothing was in order staff sucked yall kept moving gate yall could at lest give us a soda for the long rides

SEA
DEN
Good 7.3

Price

I like to get to the airport early. It's always a gamble with what the TSA lines will be. So extra time get through and enjoy some food with no rush. Had to wait for over a hour just to check on our bag.

SEA
DEN
Excellent 8.0

Great flight attendants, amazing landing in Denver.

It was delayed. But I appreciated the meal voucher and voucher for future travel.

Wed, Mar 21
SEA
DEN
2h 37m
Wed, Mar 28
DEN
SEA
3h 03m
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 85 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
SEA
DEN
Okay 5.0

Delay in connecting flight from Seattle to Denver caused us to board our plane to Grand Rapids moments before the doors closed. Had we missed our flight, an unpaid work day would have incurred as we would not have arrived in Grand Rapids until the following afternoon.

SEA
DEN
Mediocre 2.0

Flight was smooth and on time

The boarding gate attendants were rude and uncaring when we asked them to help us switch pre-assigned seats to ensure our two year old sat with us. While we might have understood better had they been empathetic, they were rude and uncaring and said when you book online you sign a waiver and they can not do anything about this. Wow. This was our flight back. Originally on the way to our destination we had used Delta and that customer service experience was completely different even though that flight was full too. Never flying United again as long as I can avoid it.

SEA
DEN
Excellent 10.0

Sat by united pilot who was just on flight to go to training and was with my 10 mo old daughter and was absolutley wonderful, so helpful and Im sure it was not an ideal situation for him. On second flight we sat next to flight attendant and a trainee and made our first flight trip... that could have been awful great! Big thanks to all the staff.

SEA
DEN
Good 7.0

Failed to put my bag on the flight even with ample preflight time, simply irritating

SEA
DEN
Good 6.0

Everyone was friendly.

The first plane was scary. Very bumpy and very small. No leg room and very hot.

Wed, Mar 28
SEA
DEN
2h 37m
Mon, Apr 9
DEN
SEA
3h 05m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Apr 21
SEA
DEN
2h 37m
Wed, Apr 25
DEN
SEA
3h 05m
Trip: 5 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 3.0

Didn't crash

All flights were late, seats were extremely uncomfortable.

SEA
DEN
Good 7.3

They had us pay 45 dollars per carry on bag. CARRY ON BAG..... I was very disappointed. Who does this? I guess frontier. Won't be flying with them again.

SEA
DEN
Mediocre 2.3

Dirty plane. Tight quarters. Mismanaged time. Unorganized. Not worth the 20 dollar discount in comparison to other airlines that have more comfort and don't charge an outlandish amount for a carry on. It was my first time flying Frontier, and needless to say I was incredibly disappointed. Loaded onto the plane until we were supposed to take off, then deplaned for what they said would be an hour of required maintenance (which I don't know why they didn't take care of ahead of time), turned into 3 plus hours. And they can't even offer a complimentary beverage? Unimpressed, all around.

SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

SEA
DEN
Excellent 8.0

Great flight attendants, amazing landing in Denver.

It was delayed. But I appreciated the meal voucher and voucher for future travel.

Tue, Mar 27
SEA
DEN
2h 37m
Wed, Mar 28
DEN
SEA
3h 03m
Trip: 2 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 85 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
SEA
DEN
Mediocre 2.0

The fact that I was stranded in Colorado due to weather and they would not refund my ticket even though I had purchased insurance. They wouldn't even give me a credit. Will have to think twice about doing business through KAYAK and United from now on.

SEA
DEN
Good 6.0

The flight

The time

SEA
DEN
Okay 4.0

My bagoal was pretty badly handled and caused damage that needs to be replaced. Third time flying with United where something like this has gone wrong. I won't be flying this airline again.

SEA
DEN
Okay 4.3

Nice customer service

Flight was delayed 5hrs because there was no plane available to take us to our designation. Only flown united 2 other times and similar things happened on those flights as well. Definitly won't be booking with united again

SEA
DEN
Good 6.0

Everyone was friendly.

The first plane was scary. Very bumpy and very small. No leg room and very hot.

Tue, Apr 3
SEA
DEN
2h 37m
Mon, Apr 9
DEN
SEA
3h 05m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 14
SEA
DEN
2h 48m
Tue, Mar 20
DEN
SEA
3h 09m
Trip: 7 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
SEA
DEN
Good 6.3

I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome.

Tiny old plane, props blocked my window view, no entertainment system.

DTW
SLC
Okay 5.3

Its a 3.5 hr flight. No charging outlets available. Food options very limited by the time they got to me, row 26. No in -seat entertainment screen. Hard seats.

SLC
RAP
Excellent 8.6

Crowded boarding area, but no standing around for long. Quick boarding. Entertainment not available so can't rate that. Good crew

ATL
DCA
Good 6.6

The movie availability was very much appreciated.

Although my TSA Pre check number was on my flight coming into Atlanta, it wss not on my fight leaving Atlanta. That caused me to arrive at my gate 5 mins before boarding time and prevented me from having time to eat breakfast before my flight.

LAX
SFO
Good 7.6

Crew was wonderful, fine flight, very prompt

Was unable to board an earlier flight without paying $75. If there are seats it shouldn't be so difficult to be moved.

Wed, Mar 28
SEA
DEN
2h 37m
Tue, Apr 3
DEN
SEA
2h 59m
Trip: 7 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 85 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.4
SEA
DEN
Mediocre 2.0

The fact that I was stranded in Colorado due to weather and they would not refund my ticket even though I had purchased insurance. They wouldn't even give me a credit. Will have to think twice about doing business through KAYAK and United from now on.

SEA
DEN
Good 6.0

Everyone was friendly.

The first plane was scary. Very bumpy and very small. No leg room and very hot.

SEA
DEN
Good 7.6

No power in seats, no in-flight TV/movie without paying, but a short enough flight it was okay.

SEA
DEN
Excellent 10.0

Sat by united pilot who was just on flight to go to training and was with my 10 mo old daughter and was absolutley wonderful, so helpful and Im sure it was not an ideal situation for him. On second flight we sat next to flight attendant and a trainee and made our first flight trip... that could have been awful great! Big thanks to all the staff.

SEA
DEN
Excellent 9.3

View

Over an hour delay

Tue, Apr 3
SEA
DEN
2h 41m
Tue, Apr 10
DEN
SEA
3h 08m
Trip: 8 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

SEA
DEN
Mediocre 3.6

Crew was entertaining

Second most uncomfortable plane I've ever been on. Most uncomfortable was the frontier transfer directly after.

SEA
DEN
Mediocre 2.6

hmm

layover nothing was in order staff sucked yall kept moving gate yall could at lest give us a soda for the long rides

SEA
DEN
Mediocre 2.0

I was notified of my flight departing Seattle was delayed resulting in it being impossible for me to make my connecting flight in Denver to Philadelphia hence missing an entire 24 hours I could’ve spent with my family and loosing vacation time. Frontier has not done anything to compensate me for the inconvenience.

SEA
DEN
Good 7.3

Price

I like to get to the airport early. It's always a gamble with what the TSA lines will be. So extra time get through and enjoy some food with no rush. Had to wait for over a hour just to check on our bag.

Wed, Mar 21
SEA
DEN
2h 56m
Wed, Mar 28
DEN
SEA
3h 03m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 28
SEA
DEN
2h 56m
Wed, Apr 4
DEN
SEA
3h 00m
Trip: 8 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
ATL
DCA
Good 6.6

The movie availability was very much appreciated.

Although my TSA Pre check number was on my flight coming into Atlanta, it wss not on my fight leaving Atlanta. That caused me to arrive at my gate 5 mins before boarding time and prevented me from having time to eat breakfast before my flight.

SEA
DEN
Good 6.3

I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome.

Tiny old plane, props blocked my window view, no entertainment system.

SLC
RAP
Excellent 8.6

Crowded boarding area, but no standing around for long. Quick boarding. Entertainment not available so can't rate that. Good crew

DTW
SLC
Okay 5.3

Its a 3.5 hr flight. No charging outlets available. Food options very limited by the time they got to me, row 26. No in -seat entertainment screen. Hard seats.

DCA
ATL
Excellent 10.0

The in-flight movie was very much appreciated.

Wed, Apr 4
SEA
DEN
2h 41m
Tue, Apr 10
DEN
SEA
3h 08m
Trip: 7 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 466 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
DEN
Excellent 8.6

boarding/unboarding is painless and enjoyable and attendants are respectfull

snacks and cokes are charged

SEA
DEN
Excellent 8.0

Great flight attendants, amazing landing in Denver.

It was delayed. But I appreciated the meal voucher and voucher for future travel.

SEA
DEN
Mediocre 3.3

Good connection, timely departure, pleasant crew

Budget airline ended up being much more expensive than my usual airlines. $40 per bag per leg of the trip, including carry-on?! My wife and I each had one carry on bag (normally free). Since we had a connection each direction that's $40 x 2 (people) x 4 flights = $320. That's ridiculous. Furthermore, these were the worst seating conditions on any airline I've ever seen (and I fly plenty). There is no headrest - the seats barely make it to my shoulders. And the seats themselves have no cushion whatsoever. The tray tables are laughably miniscule - much smaller than my laptop. There is no free snack/beverage or in-flight entertainment. There is no wifi. I will stick to United or Delta in the future.

SEA
DEN
Mediocre 2.0

Nothing positive

I wasn't allowed to board because they closed the flight. I didn't realize you have to pay an additional fee to get your seat assignement to even get on the flight. I've been delayed a full 24hrs. That on top of $40 fee to have my carry on. At this point, my $175 plane ticket has ballooned to almost $245 which is more expensive than other flights where they treat you like a human being. F this company.

SEA
DEN
Good 7.3

They had us pay 45 dollars per carry on bag. CARRY ON BAG..... I was very disappointed. Who does this? I guess frontier. Won't be flying with them again.

Wed, Apr 4
SEA
DEN
2h 53m
Wed, Apr 18
DEN
SEA
2h 58m
Trip: 15 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 10 reviews
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.4
Entertainment
7.5
Food
7.4
ATL
DCA
Good 6.6

The movie availability was very much appreciated.

Although my TSA Pre check number was on my flight coming into Atlanta, it wss not on my fight leaving Atlanta. That caused me to arrive at my gate 5 mins before boarding time and prevented me from having time to eat breakfast before my flight.

DTW
SLC
Okay 5.3

Its a 3.5 hr flight. No charging outlets available. Food options very limited by the time they got to me, row 26. No in -seat entertainment screen. Hard seats.

SLC
RAP
Excellent 8.6

Crowded boarding area, but no standing around for long. Quick boarding. Entertainment not available so can't rate that. Good crew

SEA
DEN
Excellent 10.0

The staff of the flight were very friendly and attentive. They were great!

SEA
DEN
Good 6.0

Seats were uncomfortable

Mon, Mar 5
SEA
DEN
2h 48m
Wed, Mar 14
DEN
SEA
2h 56m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews

Washington to Denver International Flight Information

Flights Arrive in Denver International
Flights Depart from Washington
Flight Price $82
Airlines Frontier, United, Delta
*
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