Miami to Seattle (MIA-SEA): nonstop upgrade & award space

American Airlines, Alaska Airlines, and Delta Air Lines fly nonstop between Miami (MIA) and Seattle (SEA), roughly 23 times a week. Long-haul cabins on a corridor this busy are large but never idle: premium cabin inventory reshuffles around every schedule change, and the best dates go first. 2LNR tracks confirmed upgrade and award space on American Airlines, Alaska Airlines, and Delta Air Lines, on every MIA to SEA departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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23
Nonstop flights a week
2,721 mi
Nonstop distance
Free
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Miami to Seattle flight schedule

Scheduled nonstop departures for MIA to SEA, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Miami (MIA) to Seattle (SEA)
Date Flight Airline Departs MIA Arrives SEA Duration Aircraft
DL 564Delta Air Lines18:0521:596h 54m32Q
AS 305Alaska Airlines, Inc.18:1621:546h 38m7M9
DL 506Delta Air Lines18:1921:556h 36m32Q
AA 3252American Airlines20:4500:206h 35m32Q
DL 564Delta Air Lines18:0521:596h 54m32Q
DL 506Delta Air Lines18:1921:556h 36m32Q
AS 305Alaska Airlines, Inc.18:2022:006h 40m7M8
AA 3252American Airlines20:4500:206h 35m32Q
DL 564Delta Air Lines18:0521:596h 54m32Q
AS 305Alaska Airlines, Inc.18:1621:546h 38m7M9
DL 506Delta Air Lines18:1921:556h 36m32Q
AA 3252American Airlines20:4500:206h 35m32Q
DL 564Delta Air Lines18:0521:596h 54m32Q
DL 506Delta Air Lines18:1921:556h 36m32Q
AS 305Alaska Airlines, Inc.18:2022:006h 40m7M8
AA 3252American Airlines20:4500:206h 35m32Q
DL 564Delta Air Lines18:0521:596h 54m32Q
AS 305Alaska Airlines, Inc.18:1621:546h 38m7M9
DL 506Delta Air Lines18:1921:556h 36m32Q
AA 3252American Airlines20:4500:206h 35m32Q
DL 564Delta Air Lines18:0521:596h 54m32Q
AS 305Alaska Airlines, Inc.18:1621:546h 38m7M9
DL 506Delta Air Lines18:1921:556h 36m32Q
AA 3252American Airlines20:4500:206h 35m32Q
AS 305Alaska Airlines, Inc.18:1621:546h 38m7M9
DL 506Delta Air Lines18:1921:556h 36m32Q
AA 3252American Airlines20:4500:206h 35m32Q

Showing all 27 scheduled MIA to SEA departures across the next 7 days with service. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every MIA to SEA date on the interactive map

Confirmed upgrade & award space on MIA to SEA departures

2LNR tracks confirmed upgrade and award space on American Airlines, Alaska Airlines, and Delta Air Lines, segment by segment and date by date. Open the calendar for Miami to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

See real availability

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

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

Airlines flying Miami to Seattle nonstop

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

See MIA to SEA on the interactive map →

Frequently asked questions about MIA to SEA

How far is Seattle from Miami?
MIA to SEA covers about 2,721 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from MIA to SEA?
American Airlines, Alaska Airlines, and Delta Air Lines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines, Alaska Airlines, and Delta Air Lines.
How many flights a week are there from MIA to SEA?
About 23 nonstop flights a week run between Miami and Seattle in the current schedule, operated by American Airlines, Alaska Airlines, and Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from MIA to SEA depart?
Scheduled MIA to SEA nonstops in the next 7 days with service leave between 18:05 and 20:45, local time at Miami. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on MIA to SEA?
Open the MIA to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines, Alaska Airlines, and Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss MIA to SEA upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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