SEA - DEN

$79 Find Cheap United Airlines Flights from Seattle to Denver

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Cheap United Airlines Flight Deals from Seattle to Denver

 
Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Seattle to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip United Airlines flight deals from Seattle to Denver

Recommended round-trip United Airlines deals departing in the coming months from the most popular airlines that fly from Seattle to Denver.
Discover the best prices and deals for you by selecting your travel dates.
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8:50 am - 12:36 pmSEA-DEN
2h 46mnonstop
7:00 pm - 9:01 pmDEN-SEA
3h 01mnonstop
$157United Airlines
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Tue, Feb 18 - Wed, Feb 19
6:00 pm - 9:44 pmSEA-DEN
2h 44mnonstop
6:00 am - 11:12 amDEN-SEA
6h 12m1 stop
$173United Airlines
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Wed, Feb 12 - Wed, Feb 19
5:00 am - 8:43 amSEA-DEN
2h 43mnonstop
4:10 pm - 6:15 pmDEN-SEA
3h 05mnonstop
$177United Airlines
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Sat, Feb 1 - Sat, Feb 1
12:50 pm - 9:15 pmSEA-DEN
7h 25m1 stop
6:00 am - 11:12 amDEN-SEA
6h 12m1 stop
$182United Airlines
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Wed, Feb 12 - Wed, Feb 19
5:00 am - 8:43 amSEA-DEN
2h 43mnonstop
1:34 pm - 9:20 pmDEN-SEA
8h 46m1 stop
$187United Airlines
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Wed, Jan 29 - Wed, Jan 29
9:20 am - 6:20 pmSEA-DEN
8h 00m1 stop
6:00 am - 11:20 amDEN-SEA
6h 20m1 stop
$192United Airlines
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Sat, Feb 1 - Wed, Feb 5
7:13 pm - 10:57 pmSEA-DEN
2h 44mnonstop
6:00 am - 11:12 amDEN-SEA
6h 12m1 stop
$193United Airlines
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Fri, Feb 14 - Sun, Feb 16
9:20 am - 6:20 pmSEA-DEN
8h 00m1 stop
6:00 am - 11:20 amDEN-SEA
6h 20m1 stop
$197United Airlines
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Sun, Jan 26 - Tue, Jan 28
2:50 pm - 9:45 pmSEA-DEN
5h 55m1 stop
7:46 am - 9:47 amDEN-SEA
3h 01mnonstop
$202United Airlines
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Fri, Mar 21 - Sun, Mar 30
5:07 am - 8:50 amSEA-DEN
2h 43mnonstop
5:55 pm - 12:51 amDEN-SEA
7h 56m1 stop
$203United Airlines
Find Deal
Tue, Jun 3 - Sat, Jun 7

Good to know

Low season

January

High season

May

Cheapest flight

$79

Average price round-trip

$176
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Seattle to Denver
(price for this month)

When to Book Flights with United Airlines from Seattle to Denver

Average price per month
Flight prices as travel date approaches

FAQs for flying to Denver with United Airlines

  • How far in advance should I book tickets for a flight with United Airlines from Seattle to Denver?

    Generally, when trying to get a below average price for your ticket, try to book around 8 days before departure. For the cheapest possible price, our data suggests booking 28 days before departure.

  • Is United Airlines the cheapest airline to fly with from Seattle to Denver?

    With an average price of $305 return, United Airlines is not the cheapest airline to fly from Seattle to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $130 on average.

  • What is the cheapest United Airlines flight from Seattle to Denver?

    In the last 3 days, the lowest price for a flight with United Airlines from Seattle to Denver was $98 for a return flight and $87 for a one-way flight.

  • Does United Airlines fly direct to Denver from Seattle?

    Yes, United Airlines does offer direct flights for the route, with around 9 flights per week.

  • What’s the cheapest day of the week to fly from Seattle to Denver with United Airlines?

    On average, the cheapest day of the week to fly from Seattle to Denver with United Airlines is Monday, when prices are around $72. The most expensive day is generally Saturday, where the average price is around $119.

  • What’s the cheapest month to fly from Seattle to Denver with United Airlines?

    The cheapest month for United Airlines flights to Denver from Seattle is generally March, where plane tickets cost $148 on average. If possible, try to avoid the most expensive months of August and December, where tickets cost $191 and $213 respectively.

See more FAQs

United Airlines Customer Reviews

7.4
GoodBased on 8,942 verified guest reviews
8.1Crew
7.7Boarding
6.7Food
7.1Entertainment
7.3Comfort

Pros +
Cons -

Show reviews that mention
Traveler rating:
Sort by:
D
8.0 Very good
ORD-LHR
Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.
D
4.0 Mediocre
ORD-MCO
The flight attendants in First Class were mediocre at best. They did not take our tray away until we were about to land and only did so when I press the call button. The United person at the United Club was asked to get us our boarding pass since we missed the flight due in Chicago. She argued that we did not have seats on the flight given to us in Moline. Furthermore, she was adamant that we did not have a First Class ticket. After I spent much time with her trying to show we were correct, she reluctantly agreed. She was probably the most incompetent ticketing person I have ever met and I have traveled 3 million miles on United plus many additional miles with other carriers. United has definitely deteriorated in more than on way.
D
2.0 Poor
MLI-ORD
The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.
V
2.0 Poor
IAH-JAX
Worse customer service ever. United Airlines mever more
V
2.0 Poor
ASE-IAH
Worse customer service. United Airlines never more
V
2.0 Poor
SBP-DEN
My 5am flight was cancelled. I learned at 3am.
S
4.0 Mediocre
LIS-IAD
United left one of our bags back in SFO but that’s not my real complaint. The complaint is how it all went down. So we checked in the day before online and were told we could use the quick drop for luggage. So the next day I used baggage quick drop curbside at SFO. The agent mistakenly didn't tag my bag as he put my bag on the conveyor belt untagged. We immediately alerted him he had not tagged the bag. I walked with him to the baggage service office to find my bag and tag it. We waited outside the office for 10 mins. He came out and said everything was ok and the bag was going to be tagged and on my flight. We received a text that one of our bags was on the flight but the other was not. I alerted my first class flight attendant immediately upon boarding the flight. She was helpful and said she’d get it sorted out right away. She called over the gate agent. The gate agent used my bag number and looked over information on her device. She said my bag was on the flight. The flight attendant was standing with her, looking at the device, and also said “yep it’s on the flight”. During the flight the flight attendant made reference to how reassuring it must feel knowing the bag was on the flight. Upon arriving to IAD we received a text that my bag was not on my flight. The text said my bag would arrive to my final destination LIS 24 hrs late. I understand that mistakes happen. I was totally ok with my bag mistakenly not getting tagged at the quick drop. I was fine with walking down to baggage services to tag my bag. But, what I am not ok with is that the United staff said they fixed the mistake two different times, assuring me twice that my bag would be/was on the plane…and it wasn’t. I expected better attention by the employees, for them to do what they said they were going to do. We also spent extra money to upgrade our seats to first class, including the entire return leg from Lisbon to San Francisco because we wanted a smoother and more relaxing travel experience. Our money was not well spent. We will not be using United for travel going forward.
S
6.0 Okay
TPA-ORD
Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago
M
2.0 Poor
MBJ-EWR
Average. Newark is a United Hub, yet a flight that is early somehow ends up getting late to the gate. Newark ATC needs help badly.
V
10.0 Wonderful
LAX-SYD
Smooth flight. As always dinner could have been more generous. Breakfast was great.

Everything you need to know for your flight from Seattle to Denver

Other airlines flying from Seattle to Denver

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