Route guide · 1,020 miles
Cheap Flights from Denver to Seattle
DEN → SEA · Nonstop 2h 34m · Live round-trip fares
If Seattle is next on your list, here's the honest picture on fares from Denver. The trip covers about 1,020 miles and takes roughly 2h 34m in the air. Prices on this route reward planners: booking 3–6 weeks ahead is the sweet spot, and the lowest fares tend to sell out fast.
Live fares for DEN → SEA are updating. Use the search below for real-time prices.
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Updated daily
Flight time
2h 34m
Nonstop, typical
Distance
1,020 mi
DEN → SEA
Book ahead
3–6 weeks
Best window, typically
Nonstop airlines
3
Delta Air Lines, Southwest Airlines & more
Nonstop flights from Denver to Seattle
Nonstop service links Denver and Seattle directly — flights are flown by Delta Air Lines, Southwest Airlines, Alaska Airlines. Expect roughly 2h 34m in the air. If a nonstop is what you want, don't wait too long: booking 3–6 weeks ahead is when these seats are priced most kindly.
Booking insights: Denver → Seattle
- Distance: 1,020 miles · nonstop flight time: 2h 34m.
- Cheapest upcoming week in the live data starts around Nov 5, with fares from $74.
- Rule of thumb for this route: the sweet spot is usually 3–6 weeks before departure.
- Tuesday and Wednesday departures usually undercut Friday and Sunday fares on routes like this one.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
Price trend
Cheapest departure weeks ahead
Departing around Nov 5 is currently the cheapest window — about $5 less than the nearest weeks. Based on recent fares found for this route; prices change quickly.
Cheapest month · Denver → Seattle
November 2026
Every date's recent round-trip fare, at a glance.
Fares from
$74
Cheapest: Sat, Nov 7 — $74 · Priciest: Nov 5 — $109
Get this fare →Recent fares found for specific dates in November 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from Denver to Seattle: what you need to know
The flight
Denver to Seattle covers 1,020 miles, and a nonstop gets it done in about 2h 34m. That's long enough to settle in with a coffee and a downloaded show, short enough that a connection rarely makes sense — a layover usually doubles your travel day to save very little.
Airlines on this route
Delta Air Lines, Southwest Airlines and Alaska Airlines fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Denver (DEN)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Denver airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Seattle (SEA)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Seattle airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Seattle to Denver fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 1,020 miles, booking 3–6 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
- Flexible dates? Search a few days either side — one day can change the fare a lot.
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
Denver to Seattle flight FAQs
How long is the flight from DEN to SEA?
Nonstop flights from Denver to Seattle take about 2h 34m and cover roughly 1,020 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from Denver to Seattle?
Yes — look for Delta Air Lines, Southwest Airlines, Alaska Airlines on this route. Nonstop seats are usually priced best 3–6 weeks before departure.
What is the cheapest month to fly from Denver to Seattle?
Travelers usually find the gentlest prices away from peak periods — think post-holiday January and the early-fall weeks. Midweek dates inside those windows are cheaper still.
How much are last minute flights from DEN to SEA?
Book inside the final week and you'll usually pay a premium on DEN to SEA. Fares booked 3–6 weeks ahead are almost always kinder.
What is a good round-trip deal from Denver to Seattle?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Denver to Seattle?
The main carriers on this route are Delta Air Lines, Southwest Airlines, Alaska Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to Denver airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
More cheap flights from Denver
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