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Cheap Flights from Seattle / Tacoma International to Denver

Compare Seattle / Tacoma International to Denver flight deals

Find the cheapest month or even day of the year to fly to Denver

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Flight deals from Seattle / Tacoma International Airport to Denver

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Denver? If you want to travel next month, return fares start from Rs15,381. Find the lowest prices on one-way and return tickets right here.
Denver.Rs7,692 per passenger.Departing Wed, 15 Apr.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Seattle / Tacoma International on Wed, 15 Apr, arriving in Denver International.Price includes taxes and charges.From Rs7,692, select.
Denver.Rs7,692 per passenger.Departing Sat, 9 May.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Seattle / Tacoma International on Sat, 9 May, arriving in Denver International.Price includes taxes and charges.From Rs7,692, select.
Denver.Rs13,585 per passenger.Departing Wed, 25 Mar.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Wed, 25 Mar, arriving in Denver International.Price includes taxes and charges.From Rs13,585, select.
Denver.Rs17,313 per passenger.Departing Wed, 3 Jun.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Seattle / Tacoma International on Wed, 3 Jun, arriving in Denver International.Price includes taxes and charges.From Rs17,313, select.
Denver.Rs18,141 per passenger.Departing Sat, 25 Jul.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Seattle / Tacoma International on Sat, 25 Jul, arriving in Denver International.Price includes taxes and charges.From Rs18,141, select.
Denver.Rs18,183 per passenger.Departing Sat, 29 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Seattle / Tacoma International on Sat, 29 Aug, arriving in Denver International.Price includes taxes and charges.From Rs18,183, select.
Denver.Rs33,240 per passenger.Departing Sat, 10 Oct.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Sat, 10 Oct, arriving in Denver International.Price includes taxes and charges.From Rs33,240, select.
Denver.Rs33,535 per passenger.Departing Sat, 26 Sep.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Sat, 26 Sep, arriving in Denver International.Price includes taxes and charges.From Rs33,535, select.

Find the cheapest month to fly from Seattle / Tacoma International to Denver

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Denver flights are currently cheapest in April.
Mar
from Rs13,585
Apr
from Rs7,692
May
from Rs7,692
Jun
from Rs17,313
Jul
from Rs18,141
Aug
from Rs18,183
Sep
from Rs33,535
Oct
from Rs33,240
Nov
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Dec
Find prices
Jan
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Feb
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Direct flights from Seattle / Tacoma International to Denver

Alternative Seattle / Tacoma International to Denver routes

Looking for the cheapest, fastest or easiest route from Seattle / Tacoma International to Denver? You could fly into the following airports instead.

Denver Arapahoe Co

1km from central Denver
Closest
Search flights

Broomfield

23km from central Denver
Search flights

Denver International

30km from central Denver
Cheapest
from Rs7,692
Search flights

Northern Colorado Regional

79km from central Denver
Search flights

Seattle to Denver: Flight information

The things to know before you go.
Cheapest flight foundRs7,692
Cheapest month to flyApril
Average flight time2 hrs, 48 mins
Most popular airlineSouthwest Airlines
Average flights per week396

Finding cheap flights from Seattle / Tacoma International to Denver: Frequently asked questions

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.
The best price we found for a return flight from Seattle / Tacoma International to Denver is Rs15,381. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 48 minutes is the average flight time from Seattle / Tacoma International to Denver.
Southwest Airlines, Alaska Airlines and United fly direct from Seattle / Tacoma International to Denver.
As of March 2026, there are 396 flights per week flying from Seattle / Tacoma International to Denver.
The cheapest month to fly from Seattle / Tacoma International to Denver is usually April.
If you're flying from Seattle / Tacoma International Airport, the cheapest airport near Denver is Denver International – which is 29.9 km away from the centre of Denver. We've found flights into this airport from Rs15,381.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Denver on Thursday, 16 April 2026.
Yes – the average flight time is 2 hours and 48 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 4°C. July is typically the warmest month in Denver, when it usually averages around 31°C. You can expect the least rain in January. The coldest month is December, with temperatures averaging -6°C. The rainiest month is July.
Currently, Frontier Airlines offers the cheapest flight tickets to Denver.

Travelling from Seattle-Tacoma International Airport (SEA) to Denver: what you need to know

  • Hop on a direct flight from Seattle-Tacoma International Airport to Denver and you'll be travelling for around 3 hours.

  • Seattle-Tacoma International Airport is located in Seattle. Following the UTC-6 timezone, Denver is one hour ahead of Seattle.

  • The busiest route is from Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN). There are 114 services every week between these two airports. If you want to get going as soon as possible, the earliest flight from SEA to DEN is the 05:00 United Airlines option. If you prefer travelling later, the final departure is at 21:00 with Southwest Airlines.

  • Give yourself plenty of time to get on your SEA to Denver flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Heading off during a peak period like public or school holidays? Expect longer queues at security and check-in. For peace of mind, arrive up to four hours before international flights and two hours before domestic departures.

  • You can book a direct Seattle-Tacoma International Airport to Denver ticket. Begin your trip at SEA and arrive at Denver International Airport (DEN).

  • Direct flights from Seattle-Tacoma International Airport to Denver are available from a good range of airlines. Fly with any of these:

  • Located around 18 kilometres from the centre of Seattle, SEA can be reached in about 20 minutes by car (depending on traffic). The journey on public transport will take roughly 55 minutes.

  • In search of a hotel close to SEA? If you've booked an early flight from Seattle-Tacoma International Airport to Denver, these accommodation options will put you moments from your departure gate:

  • Seattle-Tacoma International Airport maintains a solid on-time record, so flight disruptions are less likely. Departures from SEA touch down on schedule 81.27% of the time.

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Denver

  • The lowest price we've seen for a one-way Seattle-Tacoma International Airport to Denver flight is Rs7,692. The cheapest price for a return flight is Rs15,381. Bear in mind fares may change due to availability at the time of booking.

  • Book one month before you want to travel. Pricing trends suggest that this is the ideal window for finding cheap flights from SEA to Denver.

  • The best month for scoring cheap Seattle-Tacoma International Airport to Denver tickets is May. Use the 'Whole month' tool to compare flight prices, then select the dates that offer the lowest fares.

  • Stay on top of deals for cheap flights from SEA to Denver by setting up a Price Alert. We'll send you an email or notification on the app when a lower fare becomes available.

  • Tailor your flights with filters. Pick your preferred arrival and departure times, airlines and total journey duration. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Seattle-Tacoma International Airport to Denver.

Airports in Denver

Denver International Airport (DEN)

  • The distance from Denver International Airport (DEN) to central Denver is roughly 40 kilometres. It'll take you about 35 minutes to get to the centre driving.

  • It'll take around 1 hour 30 minutes to get there by public transport.

  • After your flight from Seattle-Tacoma International Airport to Denver has landed, kick back at a hotel close by. Baymont by Wyndham Denver International Airport is a comfortable option just a short drive from DEN.

  • Pick up a Denver International Airport rental car and explore Denver and beyond with your own set of wheels. Routes Car Rentals, Dollar and Budget are popular providers to choose from here.

  • Booking your ride from Denver International Airport around one week in advance of your flight from SEA to Denver can help you get the lowest rate.

  • DEN is located at 8500 Pena Boulevard.

Best time to go to Denver

  • Visit Denver in peak season if you want a lively atmosphere, but remember that hotel prices are generally higher. Alternatively, book your flights from Seattle-Tacoma International Airport to Denver in the off-season when prices are cheaper and crowds are smaller.

  • Before locking in your Seattle-Tacoma International Airport to Denver flight ticket, think about the kind of weather forecast you're hoping for. July is the warmest month in Denver, with temperatures ranging from 14ºC to 32ºC.

  • Search for cheap tickets from SEA to Denver in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -9ºC and 7ºC on average.

More about Denver

Explore more of United States

  • Denver is easy to fall in love with, but there are so many other corners of United States just waiting to be explored. About 105 kilometres south of Denver, a visit to Colorado Springs will keep you on the go. Start with attractions like US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • Around 161 kilometres south of Denver, Pueblo is another favourite stop in United States. No visit is complete without checking out Pueblo Weisbrod Aircraft Museum, Rosemount Museum and Pueblo Zoo.

Plan the rest of your trip from Seattle to Denver

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.