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3,781 km · Domestic

Raleigh-Durham (RDU) – Seattle–Tacoma (SEA)

In July 2026, 184 flights operated between Raleigh-Durham and Seattle–Tacoma (both directions), and 75.0% 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
January119126▲ 5.9%
February103108▲ 4.9%
March123139▲ 13.0%
April137162▲ 18.2%
May186185▼ 0.5%
June1801800.0%
July185184▼ 0.5%
August171––
September154––
October128–in progress
November132––
December144––
Year to date (Jan–Jul)1,0331,084▲ 4.9%

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
January81.5%84.9%▲ 4.2%
February89.3%77.8%▼ 12.9%
March94.3%77.7%▼ 17.6%
April83.9%84.0%▲ 0.1%
May82.3%83.8%▲ 1.8%
June75.0%80.6%▲ 7.5%
July68.6%75.0%▲ 9.3%
August77.2%––
September86.4%––
October90.6%–in progress
November81.8%––
December69.4%––
Year-to-date average (Jan–Jul)82.1%80.5%▼ 1.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January07–
February14▲ 300.0%
March12▲ 100.0%
April00–
May01–
June00–
July10▼ 100.0%
August5––
September0––
October1–in progress
November1––
December2––
Year to date (Jan–Jul)314▲ 366.7%

Airlines on this route

  1. Alaska Airlines 59.2%
  2. Delta Air Lines 40.8%

Oct 1, 2024 – Jul 31, 2026

By direction

RDU → SEA

Scheduled flights
1,609
Flights operated
1,593
Cancelled
16 · 1.0%
On-time departures
80.9%

SEA → RDU

Scheduled flights
1,610
Flights operated
1,600
Cancelled
10 · 0.6%
On-time departures
80.6%

RDU → SEA and SEA → RDU counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 1,907 59.2% 76.0% 16
Delta Air Lines DL 1,312 40.8% 87.6% 10

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 delay06:00–07:002.2min · 216 recorded · 215 measured
Gap to highest-delay hour13.4min06:00 ↔ 18:00
Recorded flights3,219RDU–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 · 90.7% · 216 recorded · 215 measured · Source: the US BTS 07:00 · 86.4% · 764 recorded · 757 measured · Source: the US BTS 08:00 · 84.1% · 340 recorded · 340 measured · Source: the US BTS 09:00 · 79.1% · 287 recorded · 287 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 36 recorded · 34 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 83.8% · 572 recorded · 568 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 55 recorded · 55 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 196 recorded · 193 measured · Source: the US BTS 18:00 · 63.1% · 314 recorded · 312 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 101 recorded · 98 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 72.9% · 228 recorded · 225 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · 2.2 min · 216 recorded · 215 measured · Source: the US BTS 07:00 · 6.0 min · 764 recorded · 757 measured · Source: the US BTS 08:00 · 4.9 min · 340 recorded · 340 measured · Source: the US BTS 09:00 · 8.1 min · 287 recorded · 287 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 36 recorded · 34 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 6.5 min · 572 recorded · 568 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 55 recorded · 55 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 196 recorded · 193 measured · Source: the US BTS 18:00 · 15.6 min · 314 recorded · 312 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 101 recorded · 98 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 10.2 min · 228 recorded · 225 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · 216 · 216 recorded · 215 measured · Source: the US BTS 07:00 · 764 · 764 recorded · 757 measured · Source: the US BTS 08:00 · 340 · 340 recorded · 340 measured · Source: the US BTS 09:00 · 287 · 287 recorded · 287 measured · Source: the US BTS 10:00 · 36 · 36 recorded · 34 measured · Source: the US BTS 11:00 · 4 · 4 recorded · 4 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 572 · 572 recorded · 568 measured · Source: the US BTS 16:00 · 55 · 55 recorded · 55 measured · Source: the US BTS 17:00 · 196 · 196 recorded · 193 measured · Source: the US BTS 18:00 · 314 · 314 recorded · 312 measured · Source: the US BTS 19:00 · 101 · 101 recorded · 98 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 228 · 228 recorded · 225 measured · Source: the US BTS 22:00 · 105 · 105 recorded · 104 measured · Source: the US BTS 23:00 · 1 · 1 recorded · 1 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———
06:0090.7%2.2 min215216
07:0086.4%6.0 min757764
08:0084.1%4.9 min340340
09:0079.1%8.1 min287287
10:00Fewer than 200 measured departures—3436
11:00Fewer than 200 measured departures—44
12:00No observations———
13:00No observations———
14:00No observations———
15:0083.8%6.5 min568572
16:00Fewer than 200 measured departures—5555
17:00Fewer than 200 measured departures—193196
18:0063.1%15.6 min312314
19:00Fewer than 200 measured departures—98101
20:00No observations———
21:0072.9%10.2 min225228
22:00Fewer than 200 measured departures—104105
23:00Fewer than 200 measured departures—11

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 75.3% · 473 recorded · 469 measured · Source: the US BTS Tuesday · 84.3% · 439 recorded · 439 measured · Source: the US BTS Wednesday · 83.0% · 447 recorded · 447 measured · Source: the US BTS Thursday · 81.1% · 463 recorded · 461 measured · Source: the US BTS Friday · 80.3% · 474 recorded · 471 measured · Source: the US BTS Saturday · 82.3% · 448 recorded · 441 measured · Source: the US BTS Sunday · 79.4% · 475 recorded · 465 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 · 12.1 min · 473 recorded · 469 measured · Source: the US BTS Tuesday · 4.9 min · 439 recorded · 439 measured · Source: the US BTS Wednesday · 7.3 min · 447 recorded · 447 measured · Source: the US BTS Thursday · 6.7 min · 463 recorded · 461 measured · Source: the US BTS Friday · 7.1 min · 474 recorded · 471 measured · Source: the US BTS Saturday · 6.5 min · 448 recorded · 441 measured · Source: the US BTS Sunday · 8.9 min · 475 recorded · 465 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 · 473 · 473 recorded · 469 measured · Source: the US BTS Tuesday · 439 · 439 recorded · 439 measured · Source: the US BTS Wednesday · 447 · 447 recorded · 447 measured · Source: the US BTS Thursday · 463 · 463 recorded · 461 measured · Source: the US BTS Friday · 474 · 474 recorded · 471 measured · Source: the US BTS Saturday · 448 · 448 recorded · 441 measured · Source: the US BTS Sunday · 475 · 475 recorded · 465 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday75.3%12.1 min469473
Tuesday84.3%4.9 min439439
Wednesday83.0%7.3 min447447
Thursday81.1%6.7 min461463
Friday80.3%7.1 min471474
Saturday82.3%6.5 min441448
Sunday79.4%8.9 min465475

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 · 83.3% · 252 recorded · 245 measured · Source: the US BTS Feb · 83.4% · 216 recorded · 211 measured · Source: the US BTS Mar · 85.5% · 265 recorded · 262 measured · Source: the US BTS Apr · 84.0% · 299 recorded · 299 measured · Source: the US BTS May · 83.0% · 372 recorded · 371 measured · Source: the US BTS Jun · 77.8% · 360 recorded · 360 measured · Source: the US BTS Jul · 71.8% · 370 recorded · 369 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 176 recorded · 171 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 154 recorded · 154 measured · Source: the US BTS Oct · 88.9% · 209 recorded · 208 measured · Source: the US BTS Nov · 84.7% · 249 recorded · 248 measured · Source: the US BTS Dec · 71.2% · 297 recorded · 295 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 · 7.8 min · 252 recorded · 245 measured · Source: the US BTS Feb · 4.5 min · 216 recorded · 211 measured · Source: the US BTS Mar · 6.3 min · 265 recorded · 262 measured · Source: the US BTS Apr · 5.9 min · 299 recorded · 299 measured · Source: the US BTS May · 6.4 min · 372 recorded · 371 measured · Source: the US BTS Jun · 10.4 min · 360 recorded · 360 measured · Source: the US BTS Jul · 13.6 min · 370 recorded · 369 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 176 recorded · 171 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 154 recorded · 154 measured · Source: the US BTS Oct · 2.8 min · 209 recorded · 208 measured · Source: the US BTS Nov · 3.5 min · 249 recorded · 248 measured · Source: the US BTS Dec · 13.4 min · 297 recorded · 295 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 · 252 · 252 recorded · 245 measured · Source: the US BTS Feb · 216 · 216 recorded · 211 measured · Source: the US BTS Mar · 265 · 265 recorded · 262 measured · Source: the US BTS Apr · 299 · 299 recorded · 299 measured · Source: the US BTS May · 372 · 372 recorded · 371 measured · Source: the US BTS Jun · 360 · 360 recorded · 360 measured · Source: the US BTS Jul · 370 · 370 recorded · 369 measured · Source: the US BTS Aug · 176 · 176 recorded · 171 measured · Source: the US BTS Sep · 154 · 154 recorded · 154 measured · Source: the US BTS Oct · 209 · 209 recorded · 208 measured · Source: the US BTS Nov · 249 · 249 recorded · 248 measured · Source: the US BTS Dec · 297 · 297 recorded · 295 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.3%7.8 min245252
Feb83.4%4.5 min211216
Mar85.5%6.3 min262265
Apr84.0%5.9 min299299
May83.0%6.4 min371372
Jun77.8%10.4 min360360
Jul71.8%13.6 min369370
AugFewer than 200 measured departures—171176
SepFewer than 200 measured departures—154154
Oct88.9%2.8 min208209
Nov84.7%3.5 min248249
Dec71.2%13.4 min295297

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 80.1% 2,578
  • Delayed >15 min 19.1% 615
  • Cancelled 0.8% 26
  • 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

10
10 of 10
Flight numbersBy direction DeparturesOn time
DL489 SEA → RDU 652 83.8%
AS572 SEA → RDU 624 81.5%
AS572 RDU → SEA 610 70.4%
DL354 RDU → SEA 493 90.8%
AS920 RDU → SEA 142 82.0%
AS670 RDU → SEA 131 77.1%
AS919 SEA → RDU 123 61.7%
AS677 SEA → RDU 117 76.9%
DL370 RDU → SEA 101 94.0%
DL302 RDU → SEA 62 91.9%

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 184 −0.5% 0 75.0%
June 2026 180 +0.0% 0 80.6%
May 2026 185 −0.5% 1 83.8%
April 2026 162 +18.2% 0 84.0%
March 2026 139 +13.0% 2 77.7%
February 2026 108 +4.9% 4 77.8%
January 2026 126 +5.9% 7 84.9%
December 2025 144 −4.6% 2 69.4%
November 2025 132 +13.8% 1 81.8%
October 2025 128 +60.0% 1 90.6%
September 2025 154 0 86.4%
August 2025 171 5 77.2%
July 2025 185 1 68.6%
June 2025 180 0 75.0%
May 2025 186 0 82.3%
April 2025 137 0 83.9%
March 2025 123 1 94.3%
February 2025 103 1 89.3%
January 2025 119 0 81.5%
December 2024 151 0 72.8%
November 2024 116 0 87.9%
October 2024 80 0 86.3%

How to read this chart

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