How long is the CX7840 flight?

The timetable allows 6 h 44 min. Miami to Seattle is 4,379 km (2,721 mi).

Which terminal does CX7840 use?

It usually leaves from Terminal C, gate E6 at Miami International Airport (MIA). Check the flight card above for today's terminal and gate.

What other flight numbers does CX7840 have?

Also listed as CPA7840 (Cathay Pacific's ICAO code) and CX 7840.

CX7840 Flight Status Cathay Pacific: Miami to Seattle (CPA7840)

Cathay Pacific CX 7840

Landed On Time

MIA Miami

Scheduled: 18:10
Actual: 18:25

Terminal: C | Gate: E6

Departure: Sun, Nov 8, 2026 · local time EST

Miami International Airport (MIA)

All MIA Departures >

SEA Seattle

Scheduled: 21:54
Actual: 21:32
Delay

Gate: D3

Arrival: Sun, Nov 8, 2026 · local time PST

Seattle Tacoma International Airport (SEA)

All SEA Arrivals >

Landed 7h 54m ago 100%

MIA 18:25 SEA 21:32

4,379 km (2,721 mi) flown

Estimated position based on departure and arrival times, not live tracking. Times are local at each airport.

Add to calendar

Distance: 4379 km / 2721 miles · Scheduled Duration: 06:44 · Actual Duration: 06:07

CX 7840 Flight Status & Schedule Cathay Pacific Miami to Seattle

Date	From	To	Departure	Arrival	Status	Details
Nov 08	MIA	SEA	18:25	21:32	Landed	Track >
Nov 06	MIA	SEA	18:34	21:45	Landed	Track >
Nov 04	MIA	SEA	18:21	21:25	Landed	Track >
Nov 03	MIA	SEA	18:45	21:29	Landed	Track >
Nov 02	MIA	SEA	23:15	21:54	Unknown	Track >
Nov 01	MIA	SEA	18:51	21:34	Landed	Track >

Cathay Pacific flight CX 7840 links Miami and Seattle, 4,379 km (2,721 mi) apart, and flies four times a week: Tuesday, Wednesday, Friday and Sunday. Its timetable allows 6 h 44 min; in practice it usually takes about 6 h 5 min, so it often makes up time. Yesterday it left 15 minutes late and still landed at 21:32, 22 minutes early.

< All Miami MIA Departures All Seattle SEA Arrivals >

About CX 7840

Route: Miami International Airport MIA to Seattle Tacoma International Airport SEA
Distance: 4,379 km (2,721 mi)
Typical flight time: 6 h 5 min
Flies: Tue, Wed, Fri, Sun
On time: 5 of the last 5
Usually departs from: Terminal C, gate E6

CX 7840 FAQ

How long is the CX7840 flight?: The timetable allows 6 h 44 min. Miami to Seattle is 4,379 km (2,721 mi).
How often is CX7840 late?: None of the last 5 flights arrived 15 or more minutes late.
Which days does CX7840 fly?: Four times a week: Tuesday, Wednesday, Friday and Sunday, based on the schedule of the last 7 days.
Which terminal does CX7840 use?: It usually leaves from Terminal C, gate E6 at Miami International Airport (MIA). Check the flight card above for today's terminal and gate.
What other flight numbers does CX7840 have?: Also listed as CPA7840 (Cathay Pacific's ICAO code) and CX 7840.

CX7840 and Miami MIA to Seattle SEA Flights

Flight CX7840 is a code-share Cathay Pacific flight of the Alaska Airlines operated AS305.

Other flights departing from Miami MIA: AS305, 5Y55

Other flights arriving at Seattle SEA: AS305, AS572

All flights connecting Miami MIA to Seattle SEA.