Compare fares, departure times, stops and baggage details for this route, then open the full search when you are ready to check current availability and complete booking.
SEADENFri, 30 Oct
Fare checked before payment All fees shown upfront Transparent cancellation policy 24×7 booking support
Lowest fareUS$76Delta Air Lines
Fastest2h 37mgate to gate
Options found44flights on this route
Find your flightSEA → DEN
Available Flights & Fares
Compare fares, timings and baggage. Pick the flight that suits your trip.
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-6053
06:00
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
7H :22 M
1 Stop
LAX
· 1h 54m Los Angeles (LAX), United States
14:22
2026-10-30
Denver (DEN)Denver International
Non Refundable 6 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
$339
Flight DetailsSEA to DEN - 7H :22 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Type
Non Refundable
Fare Type
AirLine Private
0 Pieces 1 Pieces
$1,271
Flight DetailsSEA to DEN - 7H :22 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
United Airlines
UA-1027
12:20
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :24 M
1 Stop
LAX
· 1h 12m Los Angeles (LAX), United States
19:44
2026-10-30
Denver (DEN)Denver International
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 1 Pieces
$339
Flight DetailsSEA to DEN - 6H :24 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Type
Non Refundable
Fare Type
AirLine Private
0 Pieces 1 Pieces
$1,271
Flight DetailsSEA to DEN - 6H :24 M
Baggage InfoCheck-in 0 Pieces - Cabin 1 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Alaska Airlines
AS-761
07:20
2026-10-30
SEATTLE (SEA)Seattle/tacoma International
6H :12 M
1 Stop
PDX
· 2h 21m Portland (PDX), United States
14:32
2026-10-30
Denver (DEN)Denver International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 2 Pieces
$346
Flight DetailsSEA to DEN - 6H :12 M
Baggage InfoCheck-in 0 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
No flights match the selected filters. Clear filters or open full search.
Airfare Highlights
From flights departing on Fri, 30 Oct 2026.
Lowest fare$76Delta Air Lines20:00
Earliest departure$635American Airlines00:25
Shortest duration$176United Airlines05:05
Night
00:00-05:59
$176United Airlines at 05:05Morning
06:00-11:59
$144Delta Air Lines at 09:05Afternoon
12:00-17:59
$90Delta Air Lines at 13:55Evening
18:00-23:59
$76Delta Air Lines at 20:00
Departure & Arrival Airport Details
Seattle (SEA)
Seattle/tacoma International
United States
GMT -8
Latitude: 47.449001
Longitude: -122.308998
Denver (DEN)
Denver International
United States
GMT -7
Latitude: 39.861698150635
Longitude: -104.672996521
Distance: Seattle (SEA), United States to Denver (DEN), United States - 1,645.07 km
Flights shown for 30 Oct 2026. View all flights opens the complete search result.
Fares and hotel rates usually run higher around these dates. Booking earlier or moving your trip by a day or two often costs less.
Busiest periods: Summer travel (15 Jun – 31 Aug), Holiday season (18 Dec – 02 Jan).
12OctColumbus DayMondayPeak
12OctColumbus DayMondayPeak
12OctIndigenous Peoples' DayMondayPeak
11NovVeterans DayWednesdayPeak
26NovThanksgiving DayThursdayPeak
25DecChristmas DayFridayPeak
Fixed-date national holidays. Festivals that follow the lunar calendar shift each year and are not listed here, so check the exact date for your travel year.
Compare your journey
How to travel Seattle to Denver
Ways to make this trip that you can book on FlyX, compared by price and journey time.
OptionFromJourney timeAvailabilityAction
Non-stop flight Fastest₹7,3632h 37m13 flights
Connecting flight₹9,461Longer, includes a stop31 options
Air distance is about 1,645 km. 4 airlines operate this route.
Road distance and coach duration are approximate estimates from the air distance, not a timetable.
Airlines flying from Seattle to Denver
Compare fares, stops, baggage and refundability across the airlines flying this route.
UN
United Airlines Flights
from $13116 flights
Fares from
$131
Non-stop
6 in these results
Departures
16 in the list above
DE
Delta Air Lines Flights
from $7612 flights
Fares from
$76
Non-stop
3 in these results
Departures
12 in the list above
AL
Alaska Airlines Flights
from $1669 flights
Fares from
$166
Non-stop
4 in these results
Departures
9 in the list above
AM
American Airlines Flights
from $1397 flights
Fares from
$139
Non-stop
None in these results
Departures
7 in the list above
Route Overview & Flight Facts
Fastest flight duration
2h 37m · United Airlines
First departure of the day
00:25 · American Airlines
Last departure of the day
23:59 · American Airlines
Flight options found
44
Direct / non-stop options
13
Airport codes
Seattle–SEA, Denver–DEN
Fares and timings are indicative. The exact price is confirmed with the airline when you search.
Flight Schedule, Timings & Airfare Insights
Daily Flight Schedule & Travel Duration
The search for Fri, 30 Oct found 44 flight options, 13 of them non-stop. The first flight leaves around 00:25 and the last around 23:59. The fastest flight takes about 2h 37m.
Morning vs Evening Departure Fares
Lowest fare by departure window: Evening from $76, Afternoon from $90, Morning from $144, Night from $176. These observations do not predict the cheapest departure window on other dates.
Cheapest Airfare & Best Time to Book
Search your travel dates to compare current fares. Prices change with airline seat availability.
One-Way vs Round-Trip Fare Comparison
Compare the complete cost and conditions of both options for your dates. A round-trip can have different fare and change rules from two one-way tickets. One booking may contain multiple airline PNRs; confirm baggage transfer and connection protection for separate tickets.
Online Web Check-In & Boarding Pass
Check the operating airline’s opening time and check-in deadline for each sector. Seat charges and availability depend on your fare. Use the airline reference and the links on Web Check-in.
How to Book Cheap Flights on FlyX
1
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2
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Sort or filter the Seattle–Denver results by price, departure time, stops and airline.
3
Open the fare choices
Check baggage allowance and refundability for each fare type before continuing.
4
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5
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Why Book Your Flight with FlyX?
Compare the available Seattle to Denver options by total price, stops, baggage and fare conditions. Search your dates for current availability, then review traveller details and the final price before paying.
Payment confirmation and ticket issuance are separate steps. If your booking is awaiting a PNR or ticket, follow its status and contact FlyX support when you need help. Your issued ticket contains the airline reference and itinerary. Change and cancellation charges depend on the purchased fare and any separately disclosed service fee.
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Frequently Asked Questions
Is it worth booking Seattle to Denver flights in advance?
There is no guaranteed cheapest booking window. Compare your planned dates early, check nearby dates and consider baggage, connection time and change conditions as well as price. On the Seattle to Denver dates shown on this page, the lowest fare is on a Friday at $76. This can change from week to week.
How far is Seattle from Denver by air?
The direct air distance between Seattle (SEA) and Denver (DEN) is about 1,645 km. Actual flight time varies with the routing the airline files and with winds on the day.
Are there non-stop flights from SEA to DEN?
Yes. 13 non-stop flights are listed on this page for Seattle to Denver. Use the Stops filter to see only those.
Which airlines fly Seattle to Denver?
United Airlines, Delta Air Lines, Alaska Airlines and American Airlines are listed on this route for the dates shown here. Fares, baggage allowance and refund rules differ by airline and by fare type, so compare the fare conditions and not only the headline price.
How long is the flight from Seattle to Denver?
The quickest non-stop Seattle to Denver flight on this page takes about 2h 37m. Non-stop flights here take between 2h 37m and 8h 7m. Journeys with a stop take longer, since the total includes the layover.
What is the cheapest Seattle to Denver flight fare?
The lowest Seattle to Denver fare on this page is $76. Fares on the same dates run up to $807, depending on airline, timing and fare type. Airline prices change often, so search your dates for the current fare.
What time do Seattle to Denver flights depart?
On the dates shown here, the first departure is around 00:25 and the last around 23:59, local time at Seattle. Use the departure-time filter on the results above to narrow to a morning, afternoon or evening slot.
Why does the price change after clicking Book Now?
Airline seat inventory and fares change continuously. Selecting Book Now runs a live fare verification with the airline so the price you approve is the price you pay. If it has moved, you see the new figure before any payment.
Before you book this route
Check the airport codes SEA–DEN, local departure and arrival dates, and every connecting airport. Connections can have different document and baggage requirements from your final destination.
Where these fares come from
The fares, durations, stops and baggage shown here come from real airline search results for this route. They are examples for the dates on this page, not a full timetable and not a locked price. Run a search to see what is available for your own dates.
Fares shown are for departures on .
Check official travel requirements
Confirm passport, visa and transit rules for your nationality and full itinerary with the relevant government and operating airline. IATA travel-document information explains why requirements vary.
Planning more than the flight? Our United States guide covers the visa process for Indian passport holders, best time to go, how long to plan for, and which places are worth the days you have. Long-haul city breaks and national parks.
The SEA to DEN cards above show selected flight options. Airline prices and seat availability can move quickly, so the final fare is rechecked in the booking flow.
Approx route distance: 1,645.07 km.
Before you book
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Continue to Booking opens the verified fare choices, including baggage and refundability, before review.
Lowest Seattle to Denver airfare, in 30 days and in 90 days
Cheapest Fare
Fare
Date
Airline
Departure
Lowest Airfare
$76
30/10/2026
Delta Air Lines
20:00
Cheapest Airfare Within 30 Days
$75
07/11/2026
Delta Air Lines
20:00
Cheapest Airfare Within 90 Days
$73
06/01/2027
Delta Air Lines
20:00
Book Seattle to Denver Flight Tickets on FlyX
FlyX lists each Seattle to Denver flight in these results with its fare, departure time, stops, layover airport and baggage, so you can compare air tickets side by side. To find a cheap ticket, sort by price and check what baggage the fare includes. The fare is checked with the airline again before you pay.
Seattle to Denver Flight Distance, Duration and Time
The aerial distance between Seattle and Denver is about 1,645 KM. In these results, journey times range from 2h 37m to 8h 7m. Flights with a layover take longer because the total includes the connection time.
Seattle to Denver Flight Schedule and Timing
The search for these dates returned 44 flight options, 13 of them non-stop. The first departure from Seattle is at 00:25 and the last is at 23:59. Flights leave from Seattle/tacoma International and land at Denver International.
Flight Route Details & Analysis
Flight Details
Information
Route
Seattle to Denver
Aerial Distance
1,645 KM
Flight Duration
2h 37m - 8h 7m
Airport Codes
Seattle - SEA, Denver - DEN
Total Flights Available
44 flights13 direct31 with layovers
First Flight Departure
Departs at 00:25
Last Flight Departure
Departs at 23:59
Early Morning Flights (12 AM - 8 AM)
7 flights2 direct5 with layovers
Morning Flights (8 AM - 12 PM)
11 flights3 direct8 with layovers
Afternoon Flights (12 PM - 4 PM)
19 flights5 direct14 with layovers
Evening Flights (4 PM - 8 PM)
5 flights2 direct3 with layovers
Night Flights (8 PM - 12 AM)
2 flights1 direct1 with layover
Airport Information & Terminals
SEA: Seattle-Tacoma International Airport. Sea-Tac connects to downtown by light rail, while cabs are useful for Bellevue, Redmond or late-night arrivals. Rain and freeway traffic should be part of the plan.
DEN: Denver airport. Denver airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
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Seattle to Denver
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Seattle/tacoma International
