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3,738 km · Domestic

Ronald Reagan Washington National (DCA) – Seattle–Tacoma (SEA)

In July 2026, 180 flights operated between Ronald Reagan Washington National and Seattle–Tacoma (both directions), and 76.7% 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
January117176▲ 50.4%
February105166▲ 58.1%
March169178▲ 5.3%
April1801800.0%
May1861860.0%
June180178▼ 1.1%
July178180▲ 1.1%
August182––
September180––
October186–in progress
November178––
December182––
Year to date (Jan–Jul)1,1151,244▲ 11.6%

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
January82.9%81.3%▼ 1.9%
February59.0%74.7%▲ 26.6%
March85.2%81.5%▼ 4.3%
April87.8%88.3%▲ 0.6%
May82.3%88.2%▲ 7.2%
June81.1%82.0%▲ 1.1%
July75.8%76.7%▲ 1.2%
August84.1%––
September78.9%––
October83.3%–in progress
November81.5%––
December79.7%––
Year-to-date average (Jan–Jul)79.2%81.8%▲ 3.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January710▲ 42.9%
February72▼ 71.4%
March18▲ 700.0%
April00–
May00–
June02–
July82▼ 75.0%
August4––
September0––
October0–in progress
November0––
December4––
Year to date (Jan–Jul)2324▲ 4.3%

Airlines on this route

  1. Alaska Airlines 72.1%
  2. Delta Air Lines 27.9%

Oct 1, 2024 – Jul 31, 2026

By direction

DCA → SEA

Scheduled flights
1,822
Flights operated
1,792
Cancelled
30 · 1.6%
On-time departures
81.8%

SEA → DCA

Scheduled flights
1,822
Flights operated
1,796
Cancelled
26 · 1.4%
On-time departures
81.6%

DCA → SEA and SEA → DCA counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 2,626 72.1% 79.9% 31
Delta Air Lines DL 1,018 27.9% 86.2% 25

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 delay08:00–09:003.8min · 1,315 recorded · 1,301 measured
Gap to highest-delay hour21.2min08:00 ↔ 16:00
Recorded flights3,644DCA–SEA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 93.6% · 509 recorded · 497 measured · Source: the US BTS 08:00 · 87.8% · 1,315 recorded · 1,301 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 67.4% · 523 recorded · 518 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 132 recorded · 129 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 78.6% · 509 recorded · 496 measured · Source: the US BTS 17:00 · 75.1% · 656 recorded · 647 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 4.1 min · 509 recorded · 497 measured · Source: the US BTS 08:00 · 3.8 min · 1,315 recorded · 1,301 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 18.3 min · 523 recorded · 518 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 132 recorded · 129 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 25.0 min · 509 recorded · 496 measured · Source: the US BTS 17:00 · 14.4 min · 656 recorded · 647 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 509 · 509 recorded · 497 measured · Source: the US BTS 08:00 · 1,315 · 1,315 recorded · 1,301 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 523 · 523 recorded · 518 measured · Source: the US BTS 14:00 · 132 · 132 recorded · 129 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 509 · 509 recorded · 496 measured · Source: the US BTS 17:00 · 656 · 656 recorded · 647 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00No observations———
07:0093.6%4.1 min497509
08:0087.8%3.8 min1,3011,315
09:00No observations———
10:00No observations———
11:00No observations———
12:00No observations———
13:0067.4%18.3 min518523
14:00Fewer than 200 measured departures—129132
15:00No observations———
16:0078.6%25.0 min496509
17:0075.1%14.4 min647656
18:00No observations———
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.5% · 522 recorded · 511 measured · Source: the US BTS Tuesday · 84.3% · 522 recorded · 515 measured · Source: the US BTS Wednesday · 82.1% · 522 recorded · 518 measured · Source: the US BTS Thursday · 76.6% · 518 recorded · 509 measured · Source: the US BTS Friday · 81.8% · 522 recorded · 517 measured · Source: the US BTS Saturday · 88.5% · 516 recorded · 511 measured · Source: the US BTS Sunday · 78.9% · 522 recorded · 507 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 · 11.0 min · 522 recorded · 511 measured · Source: the US BTS Tuesday · 10.0 min · 522 recorded · 515 measured · Source: the US BTS Wednesday · 11.1 min · 522 recorded · 518 measured · Source: the US BTS Thursday · 20.7 min · 518 recorded · 509 measured · Source: the US BTS Friday · 8.9 min · 522 recorded · 517 measured · Source: the US BTS Saturday · 3.5 min · 516 recorded · 511 measured · Source: the US BTS Sunday · 13.1 min · 522 recorded · 507 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 · 522 · 522 recorded · 511 measured · Source: the US BTS Tuesday · 522 · 522 recorded · 515 measured · Source: the US BTS Wednesday · 522 · 522 recorded · 518 measured · Source: the US BTS Thursday · 518 · 518 recorded · 509 measured · Source: the US BTS Friday · 522 · 522 recorded · 517 measured · Source: the US BTS Saturday · 516 · 516 recorded · 511 measured · Source: the US BTS Sunday · 522 · 522 recorded · 507 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.5%11.0 min511522
Tuesday84.3%10.0 min515522
Wednesday82.1%11.1 min518522
Thursday76.6%20.7 min509518
Friday81.8%8.9 min517522
Saturday88.5%3.5 min511516
Sunday78.9%13.1 min507522

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 · 81.9% · 310 recorded · 293 measured · Source: the US BTS Feb · 68.6% · 280 recorded · 271 measured · Source: the US BTS Mar · 83.3% · 356 recorded · 347 measured · Source: the US BTS Apr · 88.1% · 360 recorded · 360 measured · Source: the US BTS May · 85.2% · 372 recorded · 372 measured · Source: the US BTS Jun · 81.6% · 360 recorded · 358 measured · Source: the US BTS Jul · 76.3% · 368 recorded · 358 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 182 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 84.2% · 266 recorded · 266 measured · Source: the US BTS Nov · 84.8% · 296 recorded · 295 measured · Source: the US BTS Dec · 80.7% · 310 recorded · 306 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 · 9.7 min · 310 recorded · 293 measured · Source: the US BTS Feb · 20.2 min · 280 recorded · 271 measured · Source: the US BTS Mar · 12.2 min · 356 recorded · 347 measured · Source: the US BTS Apr · 5.9 min · 360 recorded · 360 measured · Source: the US BTS May · 6.2 min · 372 recorded · 372 measured · Source: the US BTS Jun · 14.0 min · 360 recorded · 358 measured · Source: the US BTS Jul · 18.1 min · 368 recorded · 358 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 182 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 3.8 min · 266 recorded · 266 measured · Source: the US BTS Nov · 10.9 min · 296 recorded · 295 measured · Source: the US BTS Dec · 9.8 min · 310 recorded · 306 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 · 310 · 310 recorded · 293 measured · Source: the US BTS Feb · 280 · 280 recorded · 271 measured · Source: the US BTS Mar · 356 · 356 recorded · 347 measured · Source: the US BTS Apr · 360 · 360 recorded · 360 measured · Source: the US BTS May · 372 · 372 recorded · 372 measured · Source: the US BTS Jun · 360 · 360 recorded · 358 measured · Source: the US BTS Jul · 368 · 368 recorded · 358 measured · Source: the US BTS Aug · 186 · 186 recorded · 182 measured · Source: the US BTS Sep · 180 · 180 recorded · 180 measured · Source: the US BTS Oct · 266 · 266 recorded · 266 measured · Source: the US BTS Nov · 296 · 296 recorded · 295 measured · Source: the US BTS Dec · 310 · 310 recorded · 306 measured · Source: the US BTS

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

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan81.9%9.7 min293310
Feb68.6%20.2 min271280
Mar83.3%12.2 min347356
Apr88.1%5.9 min360360
May85.2%6.2 min372372
Jun81.6%14.0 min358360
Jul76.3%18.1 min358368
AugFewer than 200 measured departures—182186
SepFewer than 200 measured departures—180180
Oct84.2%3.8 min266266
Nov84.8%10.9 min295296
Dec80.7%9.8 min306310

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 80.4% 2,930
  • Delayed >15 min 18.1% 658
  • Cancelled 1.5% 56
  • 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

11
11 of 11
Flight numbersBy direction DeparturesOn time
AS1 DCA → SEA 658 90.6%
AS4 SEA → DCA 657 85.0%
AS2 SEA → DCA 655 69.1%
AS3 DCA → SEA 655 75.1%
DL786 SEA → DCA 437 93.2%
DL786 DCA → SEA 235 79.0%
DL1446 DCA → SEA 136 71.6%
DL944 DCA → SEA 38 75.7%
DL508 SEA → DCA 36 91.7%
DL508 DCA → SEA 36 88.6%
DL884 SEA → DCA 36 100.0%

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 180 +1.1% 2 76.7%
June 2026 178 −1.1% 2 82.0%
May 2026 186 +0.0% 0 88.2%
April 2026 180 +0.0% 0 88.3%
March 2026 178 +5.3% 8 81.5%
February 2026 166 +58.1% 2 74.7%
January 2026 176 +50.4% 10 81.3%
December 2025 182 +46.8% 4 79.7%
November 2025 178 +52.1% 0 81.5%
October 2025 186 +132.5% 0 83.3%
September 2025 180 0 78.9%
August 2025 182 4 84.1%
July 2025 178 8 75.8%
June 2025 180 0 81.1%
May 2025 186 0 82.3%
April 2025 180 0 87.8%
March 2025 169 1 85.2%
February 2025 105 7 59.0%
January 2025 117 7 82.9%
December 2024 124 0 82.3%
November 2024 117 1 89.7%
October 2024 80 0 86.3%

How to read this chart

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