Miami (MIA) to Seattle (SEA) flights: who flies it

Miami to Seattle flight schedule

Scheduled nonstop departures for MIA to SEA starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Scheduled nonstop departures from Miami (MIA) to Seattle (SEA)
Date	Flight	Airline	Departs MIA	Arrives SEA	Duration	Aircraft
Thu, Oct 22	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Thu, Oct 22	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Thu, Oct 22	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Thu, Oct 22	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Fri, Oct 23	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Fri, Oct 23	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Fri, Oct 23	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Fri, Oct 23	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Sat, Oct 24	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Sat, Oct 24	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Sat, Oct 24	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Sat, Oct 24	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Sun, Oct 25	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Sun, Oct 25	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Sun, Oct 25	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Sun, Oct 25	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Mon, Oct 26	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Mon, Oct 26	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Mon, Oct 26	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Mon, Oct 26	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Tue, Oct 27	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Tue, Oct 27	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Tue, Oct 27	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737 MAX 9
Tue, Oct 27	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family
Wed, Oct 28	DL 564	Delta Air Lines	18:05	21:58	6h 53m	Airbus A321neo family
Wed, Oct 28	DL 506	Delta Air Lines	18:15	22:00	6h 45m	Airbus A321neo family
Wed, Oct 28	AS 305	Alaska Airlines, Inc.	18:18	21:59	6h 41m	Boeing 737-900
Wed, Oct 28	AA 3252	American Airlines	20:15	23:59	6h 44m	Airbus A321neo family

Showing all 28 scheduled MIA to SEA departures across 7 days with service, starting October 22, 2026. 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 hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every MIA to SEA date on the interactive map

Aircraft on the Miami to Seattle nonstop

In the schedule table on this page, Delta Air Lines flies the Airbus A321neo family. Alaska Airlines flies the Boeing 737 MAX 9 and the Boeing 737-900. American Airlines flies the Airbus A321neo family. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on MIA to SEA departures

2LNR tracks confirmed upgrade and award space on American Airlines, Delta Air Lines, and Alaska Airlines, 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.

In the 7 days to October 19, 2026, 2LNR checked award space on Miami to Seattle departures from October 19 to November 1. American Airlines had space open on 10 of 14 dates checked, Delta Air Lines on 14 of 14 and Alaska Airlines on 0 of 14.

See real availability

Confirmed upgrade or award seats by date on the MIA to SEA departures 2LNR tracks, checked against live inventory so you know what's open before you book.

Set an alert

Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're 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. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See MIA to SEA on the interactive map →

Frequently asked questions about MIA to SEA

How long is the flight from Miami (MIA) to Seattle (SEA)?

Scheduled flight times from Miami (MIA) to Seattle (SEA) run from 6h 41m to 6h 53m across the departures in the schedule table on this page. The nonstop covers about 2,721 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.

Which airlines fly nonstop from MIA to SEA?

American Airlines, Delta Air Lines, and Alaska Airlines fly MIA to SEA nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines, Delta Air Lines, and Alaska Airlines.

How many flights a week are there from MIA to SEA?

About 26 nonstop flights a week run between Miami (MIA) and Seattle (SEA) in the current schedule, operated by American Airlines, Delta Air Lines, and Alaska Airlines. 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 20:15, local time at Miami. The schedule table on this page lists every departure by date, with its arrival time and aircraft.

Which flights operate MIA to SEA nonstop?

In the schedule table on this page, MIA to SEA nonstops fly as DL 506 and DL 564 on Delta Air Lines; AA 3252 on American Airlines; and AS 305 on Alaska Airlines. The table lists each departure by date with its times 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, Delta Air Lines, and Alaska Airlines, 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.