Route guide

Washington to Seattle (IAD-SEA): Nonstop Upgrade & Award Space

United Airlines, Alaska Airlines, Inc., and Delta Air Lines fly nonstop between Washington (IAD) and Seattle (SEA), roughly 49 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every IAD to SEA departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

See IAD to SEA on the interactive map Get started free
49
Nonstop flights a week
2,300 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every IAD to SEA departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Washington to Seattle to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each IAD to SEA departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See IAD to SEA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Washington to Seattle nonstop

Carriers operating IAD to SEA nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • United Airlines
  • Alaska Airlines, Inc.
  • Delta Air Lines
See IAD to SEA on the interactive map →

Frequently asked questions about IAD to SEA

How far is Seattle from Washington?
IAD to SEA covers about 2,300 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from IAD to SEA?
United Airlines, Alaska Airlines, Inc., and Delta Air Lines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on all three of them.
How many flights a week are there from IAD to SEA?
About 49 nonstop flights a week run between Washington and Seattle in the current schedule, operated by United Airlines, Alaska Airlines, Inc., and Delta Air Lines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on IAD to SEA?
Open the IAD to SEA calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Washington to Seattle route, and 2LNR will notify you when space opens. It's free to start.

Never miss IAD to SEA upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

Get started free