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4,379 km · Domestic

Miami (MIA) – Seattle–Tacoma (SEA)

In July 2026, 246 flights operated between Miami and Seattle–Tacoma (both directions), and 81.7% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January205200▼ 2.4%
February1681680.0%
March186181▼ 2.7%
April180179▼ 0.6%
May185207▲ 11.9%
June180240▲ 33.3%
July182246▲ 35.2%
August184––
September180––
October184–in progress
November190––
December239––
Year to date (Jan–Jul)1,2861,421▲ 10.5%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January73.7%72.0%▼ 2.3%
February80.4%78.6%▼ 2.2%
March75.8%66.3%▼ 12.5%
April82.8%76.5%▼ 7.6%
May81.1%77.8%▼ 4.1%
June75.6%82.5%▲ 9.1%
July67.6%81.7%▲ 20.9%
August64.7%––
September77.2%––
October88.6%–in progress
November77.4%––
December76.2%––
Year-to-date average (Jan–Jul)76.7%76.5%▼ 0.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January05–
February00–
March05–
April01–
May01–
June00–
July43▼ 25.0%
August2––
September0––
October2–in progress
November3––
December2––
Year to date (Jan–Jul)415▲ 275.0%

Airlines on this route

  1. American Airlines 37.0%
  2. Alaska Airlines 34.5%
  3. Delta Air Lines 28.6%

Oct 1, 2024 – Jul 31, 2026

By direction

MIA → SEA

Scheduled flights
2,069
Flights operated
2,052
Cancelled
17 · 0.8%
On-time departures
71.4%

SEA → MIA

Scheduled flights
2,066
Flights operated
2,053
Cancelled
13 · 0.6%
On-time departures
81.9%

MIA → SEA and SEA → MIA counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
American Airlines AA 1,529 37.0% 71.7% 6
Alaska Airlines AS 1,425 34.5% 79.5% 11
Delta Air Lines DL 1,181 28.6% 79.6% 13

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay08:00–09:003.3min · 848 recorded · 841 measured
Gap to highest-delay hour21.5min08:00 ↔ 17:00
Recorded flights4,135MIA–SEA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 26 recorded · 26 measured · Source: the US BTS 07:00 · 88.0% · 533 recorded · 531 measured · Source: the US BTS 08:00 · 90.7% · 848 recorded · 841 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 47 recorded · 46 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 17:00 · 68.5% · 445 recorded · 441 measured · Source: the US BTS 18:00 · 69.8% · 773 recorded · 762 measured · Source: the US BTS 19:00 · 69.6% · 394 recorded · 392 measured · Source: the US BTS 20:00 · 69.6% · 484 recorded · 484 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 22:00 · 63.7% · 388 recorded · 388 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 42 recorded · 39 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 26 recorded · 26 measured · Source: the US BTS 07:00 · 5.0 min · 533 recorded · 531 measured · Source: the US BTS 08:00 · 3.3 min · 848 recorded · 841 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 47 recorded · 46 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 17:00 · 24.8 min · 445 recorded · 441 measured · Source: the US BTS 18:00 · 20.6 min · 773 recorded · 762 measured · Source: the US BTS 19:00 · 21.2 min · 394 recorded · 392 measured · Source: the US BTS 20:00 · 20.3 min · 484 recorded · 484 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 22:00 · 16.3 min · 388 recorded · 388 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 42 recorded · 39 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · 14 · 14 recorded · 14 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 26 · 26 recorded · 26 measured · Source: the US BTS 07:00 · 533 · 533 recorded · 531 measured · Source: the US BTS 08:00 · 848 · 848 recorded · 841 measured · Source: the US BTS 09:00 · 31 · 31 recorded · 31 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 47 · 47 recorded · 46 measured · Source: the US BTS 13:00 · 54 · 54 recorded · 54 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 4 · 4 recorded · 4 measured · Source: the US BTS 17:00 · 445 · 445 recorded · 441 measured · Source: the US BTS 18:00 · 773 · 773 recorded · 762 measured · Source: the US BTS 19:00 · 394 · 394 recorded · 392 measured · Source: the US BTS 20:00 · 484 · 484 recorded · 484 measured · Source: the US BTS 21:00 · 52 · 52 recorded · 52 measured · Source: the US BTS 22:00 · 388 · 388 recorded · 388 measured · Source: the US BTS 23:00 · 42 · 42 recorded · 39 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—1414
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00Fewer than 200 measured departures—2626
07:0088.0%5.0 min531533
08:0090.7%3.3 min841848
09:00Fewer than 200 measured departures—3131
10:00No observations———
11:00No observations———
12:00Fewer than 200 measured departures—4647
13:00Fewer than 200 measured departures—5454
14:00No observations———
15:00No observations———
16:00Fewer than 200 measured departures—44
17:0068.5%24.8 min441445
18:0069.8%20.6 min762773
19:0069.6%21.2 min392394
20:0069.6%20.3 min484484
21:00Fewer than 200 measured departures—5252
22:0063.7%16.3 min388388
23:00Fewer than 200 measured departures—3942

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 74.4% · 590 recorded · 581 measured · Source: the US BTS Tuesday · 79.3% · 579 recorded · 575 measured · Source: the US BTS Wednesday · 82.2% · 581 recorded · 577 measured · Source: the US BTS Thursday · 78.3% · 598 recorded · 595 measured · Source: the US BTS Friday · 72.8% · 596 recorded · 591 measured · Source: the US BTS Saturday · 75.3% · 592 recorded · 592 measured · Source: the US BTS Sunday · 74.4% · 599 recorded · 594 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 14.5 min · 590 recorded · 581 measured · Source: the US BTS Tuesday · 10.7 min · 579 recorded · 575 measured · Source: the US BTS Wednesday · 7.9 min · 581 recorded · 577 measured · Source: the US BTS Thursday · 15.2 min · 598 recorded · 595 measured · Source: the US BTS Friday · 15.4 min · 596 recorded · 591 measured · Source: the US BTS Saturday · 17.2 min · 592 recorded · 592 measured · Source: the US BTS Sunday · 20.5 min · 599 recorded · 594 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 590 · 590 recorded · 581 measured · Source: the US BTS Tuesday · 579 · 579 recorded · 575 measured · Source: the US BTS Wednesday · 581 · 581 recorded · 577 measured · Source: the US BTS Thursday · 598 · 598 recorded · 595 measured · Source: the US BTS Friday · 596 · 596 recorded · 591 measured · Source: the US BTS Saturday · 592 · 592 recorded · 592 measured · Source: the US BTS Sunday · 599 · 599 recorded · 594 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday74.4%14.5 min581590
Tuesday79.3%10.7 min575579
Wednesday82.2%7.9 min577581
Thursday78.3%15.2 min595598
Friday72.8%15.4 min591596
Saturday75.3%17.2 min592592
Sunday74.4%20.5 min594599

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 72.8% · 410 recorded · 405 measured · Source: the US BTS Feb · 79.5% · 336 recorded · 336 measured · Source: the US BTS Mar · 71.1% · 372 recorded · 367 measured · Source: the US BTS Apr · 79.7% · 360 recorded · 359 measured · Source: the US BTS May · 79.3% · 393 recorded · 392 measured · Source: the US BTS Jun · 79.5% · 420 recorded · 420 measured · Source: the US BTS Jul · 75.7% · 435 recorded · 428 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 184 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 89.7% · 266 recorded · 263 measured · Source: the US BTS Nov · 78.3% · 330 recorded · 327 measured · Source: the US BTS Dec · 71.6% · 447 recorded · 444 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 14.6 min · 410 recorded · 405 measured · Source: the US BTS Feb · 15.3 min · 336 recorded · 336 measured · Source: the US BTS Mar · 20.2 min · 372 recorded · 367 measured · Source: the US BTS Apr · 10.3 min · 360 recorded · 359 measured · Source: the US BTS May · 13.0 min · 393 recorded · 392 measured · Source: the US BTS Jun · 12.7 min · 420 recorded · 420 measured · Source: the US BTS Jul · 14.9 min · 435 recorded · 428 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 184 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 3.6 min · 266 recorded · 263 measured · Source: the US BTS Nov · 12.2 min · 330 recorded · 327 measured · Source: the US BTS Dec · 19.8 min · 447 recorded · 444 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 410 · 410 recorded · 405 measured · Source: the US BTS Feb · 336 · 336 recorded · 336 measured · Source: the US BTS Mar · 372 · 372 recorded · 367 measured · Source: the US BTS Apr · 360 · 360 recorded · 359 measured · Source: the US BTS May · 393 · 393 recorded · 392 measured · Source: the US BTS Jun · 420 · 420 recorded · 420 measured · Source: the US BTS Jul · 435 · 435 recorded · 428 measured · Source: the US BTS Aug · 186 · 186 recorded · 184 measured · Source: the US BTS Sep · 180 · 180 recorded · 180 measured · Source: the US BTS Oct · 266 · 266 recorded · 263 measured · Source: the US BTS Nov · 330 · 330 recorded · 327 measured · Source: the US BTS Dec · 447 · 447 recorded · 444 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan72.8%14.6 min405410
Feb79.5%15.3 min336336
Mar71.1%20.2 min367372
Apr79.7%10.3 min359360
May79.3%13.0 min392393
Jun79.5%12.7 min420420
Jul75.7%14.9 min428435
AugFewer than 200 measured departures—184186
SepFewer than 200 measured departures—180180
Oct89.7%3.6 min263266
Nov78.3%12.2 min327330
Dec71.6%19.8 min444447

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 76.1% 3,146
  • Delayed >15 min 23.2% 959
  • Cancelled 0.7% 30
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

16
16 of 16
Flight numbersBy direction DeparturesOn time
DL506 SEA → MIA 590 91.1%
AS305 MIA → SEA 550 70.8%
AS305 SEA → MIA 533 88.4%
AA1471 SEA → MIA 464 66.4%
DL506 MIA → SEA 391 63.3%
AA3252 MIA → SEA 333 70.6%
AA2363 MIA → SEA 180 68.5%
DL564 MIA → SEA 169 74.0%
AA2142 SEA → MIA 155 67.8%
AA305 MIA → SEA 145 71.0%
AS363 MIA → SEA 105 77.7%
AS363 SEA → MIA 105 91.3%
AA654 SEA → MIA 72 85.9%
AA654 MIA → SEA 72 94.4%
AS793 MIA → SEA 30 70.0%
DL2355 MIA → SEA 30 100.0%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 246 +35.2% 3 81.7%
June 2026 240 +33.3% 0 82.5%
May 2026 207 +11.9% 1 77.8%
April 2026 179 −0.6% 1 76.5%
March 2026 181 −2.7% 5 66.3%
February 2026 168 +0.0% 0 78.6%
January 2026 200 −2.4% 5 72.0%
December 2025 239 +16.6% 2 76.2%
November 2025 190 +38.7% 3 77.4%
October 2025 184 +132.9% 2 88.6%
September 2025 180 0 77.2%
August 2025 184 2 64.7%
July 2025 182 4 67.6%
June 2025 180 0 75.6%
May 2025 185 0 81.1%
April 2025 180 0 82.8%
March 2025 186 0 75.8%
February 2025 168 0 80.4%
January 2025 205 0 73.7%
December 2024 205 1 66.3%
November 2024 137 0 79.6%
October 2024 79 1 92.4%

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