Aviation Data
EN
EnglishTiếng Việt

3,855 km · Domestic

Newark Liberty (EWR) – Seattle–Tacoma (SEA)

In July 2026, 467 flights operated between Newark Liberty and Seattle–Tacoma (both directions), and 66.8% 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
January231227▼ 1.7%
February203190▼ 6.4%
March257328▲ 27.6%
April253360▲ 42.3%
May264426▲ 61.4%
June337446▲ 32.3%
July419467▲ 11.5%
August454––
September452––
October405–in progress
November325––
December353––
Year to date (Jan–Jul)1,9642,444▲ 24.4%

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
January84.4%85.5%▲ 1.3%
February81.8%82.6%▲ 1.0%
March83.3%75.0%▼ 10.0%
April75.5%88.9%▲ 17.7%
May54.9%87.6%▲ 59.6%
June73.6%79.6%▲ 8.2%
July65.4%66.8%▲ 2.1%
August74.4%––
September89.2%––
October80.5%–in progress
November77.5%––
December75.9%––
Year-to-date average (Jan–Jul)74.1%80.9%▲ 9.1%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January210▲ 400.0%
February116▲ 1,500.0%
March03–
April12▲ 100.0%
May40▼ 100.0%
June34▲ 33.3%
July1525▲ 66.7%
August4––
September2––
October7–in progress
November17––
December4––
Year to date (Jan–Jul)2660▲ 130.8%

Airlines on this route

  1. Alaska Airlines 55.1%
  2. United Airlines 44.9%

Oct 1, 2024 – Jul 31, 2026

By direction

EWR → SEA

Scheduled flights
3,655
Flights operated
3,587
Cancelled
68 · 1.9%
On-time departures
79.7%

SEA → EWR

Scheduled flights
3,656
Flights operated
3,600
Cancelled
56 · 1.5%
On-time departures
77.2%

EWR → SEA and SEA → EWR counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 4,031 55.1% 77.6% 86
United Airlines UA 3,280 44.9% 79.5% 38

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 delay07:00–08:004.6min · 1,312 recorded · 1,290 measured
Gap to highest-delay hour22.8min07:00 ↔ 12:00
Recorded flights7,311EWR–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 · 2 recorded · 2 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 · 88.9% · 547 recorded · 539 measured · Source: the US BTS 07:00 · 89.6% · 1,312 recorded · 1,290 measured · Source: the US BTS 08:00 · 84.4% · 450 recorded · 441 measured · Source: the US BTS 09:00 · 85.8% · 291 recorded · 289 measured · Source: the US BTS 10:00 · 68.1% · 584 recorded · 573 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 133 recorded · 131 measured · Source: the US BTS 12:00 · 72.6% · 221 recorded · 219 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 103 recorded · 102 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 184 recorded · 183 measured · Source: the US BTS 15:00 · 77.6% · 481 recorded · 477 measured · Source: the US BTS 16:00 · 78.8% · 419 recorded · 400 measured · Source: the US BTS 17:00 · 73.8% · 416 recorded · 401 measured · Source: the US BTS 18:00 · 71.5% · 421 recorded · 417 measured · Source: the US BTS 19:00 · 71.2% · 425 recorded · 416 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 167 recorded · 163 measured · Source: the US BTS 21:00 · 74.0% · 289 recorded · 288 measured · Source: the US BTS 22:00 · 73.9% · 409 recorded · 406 measured · Source: the US BTS 23:00 · 77.8% · 457 recorded · 450 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 · 2 recorded · 2 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 · 7.0 min · 547 recorded · 539 measured · Source: the US BTS 07:00 · 4.6 min · 1,312 recorded · 1,290 measured · Source: the US BTS 08:00 · 7.8 min · 450 recorded · 441 measured · Source: the US BTS 09:00 · 8.7 min · 291 recorded · 289 measured · Source: the US BTS 10:00 · 22.3 min · 584 recorded · 573 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 133 recorded · 131 measured · Source: the US BTS 12:00 · 27.4 min · 221 recorded · 219 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 103 recorded · 102 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 184 recorded · 183 measured · Source: the US BTS 15:00 · 12.9 min · 481 recorded · 477 measured · Source: the US BTS 16:00 · 19.8 min · 419 recorded · 400 measured · Source: the US BTS 17:00 · 23.3 min · 416 recorded · 401 measured · Source: the US BTS 18:00 · 26.7 min · 421 recorded · 417 measured · Source: the US BTS 19:00 · 16.2 min · 425 recorded · 416 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 167 recorded · 163 measured · Source: the US BTS 21:00 · 10.4 min · 289 recorded · 288 measured · Source: the US BTS 22:00 · 15.0 min · 409 recorded · 406 measured · Source: the US BTS 23:00 · 11.3 min · 457 recorded · 450 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 · 2 · 2 recorded · 2 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 · 547 · 547 recorded · 539 measured · Source: the US BTS 07:00 · 1,312 · 1,312 recorded · 1,290 measured · Source: the US BTS 08:00 · 450 · 450 recorded · 441 measured · Source: the US BTS 09:00 · 291 · 291 recorded · 289 measured · Source: the US BTS 10:00 · 584 · 584 recorded · 573 measured · Source: the US BTS 11:00 · 133 · 133 recorded · 131 measured · Source: the US BTS 12:00 · 221 · 221 recorded · 219 measured · Source: the US BTS 13:00 · 103 · 103 recorded · 102 measured · Source: the US BTS 14:00 · 184 · 184 recorded · 183 measured · Source: the US BTS 15:00 · 481 · 481 recorded · 477 measured · Source: the US BTS 16:00 · 419 · 419 recorded · 400 measured · Source: the US BTS 17:00 · 416 · 416 recorded · 401 measured · Source: the US BTS 18:00 · 421 · 421 recorded · 417 measured · Source: the US BTS 19:00 · 425 · 425 recorded · 416 measured · Source: the US BTS 20:00 · 167 · 167 recorded · 163 measured · Source: the US BTS 21:00 · 289 · 289 recorded · 288 measured · Source: the US BTS 22:00 · 409 · 409 recorded · 406 measured · Source: the US BTS 23:00 · 457 · 457 recorded · 450 measured · Source: the US BTS

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

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—22
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0088.9%7.0 min539547
07:0089.6%4.6 min1,2901,312
08:0084.4%7.8 min441450
09:0085.8%8.7 min289291
10:0068.1%22.3 min573584
11:00Fewer than 200 measured departures—131133
12:0072.6%27.4 min219221
13:00Fewer than 200 measured departures—102103
14:00Fewer than 200 measured departures—183184
15:0077.6%12.9 min477481
16:0078.8%19.8 min400419
17:0073.8%23.3 min401416
18:0071.5%26.7 min417421
19:0071.2%16.2 min416425
20:00Fewer than 200 measured departures—163167
21:0074.0%10.4 min288289
22:0073.9%15.0 min406409
23:0077.8%11.3 min450457

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 78.8% · 1,075 recorded · 1,059 measured · Source: the US BTS Tuesday · 84.2% · 1,030 recorded · 1,011 measured · Source: the US BTS Wednesday · 82.8% · 1,024 recorded · 1,016 measured · Source: the US BTS Thursday · 77.9% · 1,074 recorded · 1,057 measured · Source: the US BTS Friday · 74.1% · 1,082 recorded · 1,067 measured · Source: the US BTS Saturday · 75.7% · 940 recorded · 920 measured · Source: the US BTS Sunday · 76.0% · 1,086 recorded · 1,057 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 · 13.4 min · 1,075 recorded · 1,059 measured · Source: the US BTS Tuesday · 10.6 min · 1,030 recorded · 1,011 measured · Source: the US BTS Wednesday · 11.7 min · 1,024 recorded · 1,016 measured · Source: the US BTS Thursday · 12.7 min · 1,074 recorded · 1,057 measured · Source: the US BTS Friday · 17.9 min · 1,082 recorded · 1,067 measured · Source: the US BTS Saturday · 17.1 min · 940 recorded · 920 measured · Source: the US BTS Sunday · 18.0 min · 1,086 recorded · 1,057 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 · 1,075 · 1,075 recorded · 1,059 measured · Source: the US BTS Tuesday · 1,030 · 1,030 recorded · 1,011 measured · Source: the US BTS Wednesday · 1,024 · 1,024 recorded · 1,016 measured · Source: the US BTS Thursday · 1,074 · 1,074 recorded · 1,057 measured · Source: the US BTS Friday · 1,082 · 1,082 recorded · 1,067 measured · Source: the US BTS Saturday · 940 · 940 recorded · 920 measured · Source: the US BTS Sunday · 1,086 · 1,086 recorded · 1,057 measured · Source: the US BTS

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

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday78.8%13.4 min1,0591,075
Tuesday84.2%10.6 min1,0111,030
Wednesday82.8%11.7 min1,0161,024
Thursday77.9%12.7 min1,0571,074
Friday74.1%17.9 min1,0671,082
Saturday75.7%17.1 min920940
Sunday76.0%18.0 min1,0571,086

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 · 84.9% · 470 recorded · 458 measured · Source: the US BTS Feb · 82.2% · 410 recorded · 393 measured · Source: the US BTS Mar · 78.6% · 588 recorded · 585 measured · Source: the US BTS Apr · 83.4% · 616 recorded · 613 measured · Source: the US BTS May · 75.1% · 694 recorded · 690 measured · Source: the US BTS Jun · 77.0% · 790 recorded · 783 measured · Source: the US BTS Jul · 66.1% · 926 recorded · 886 measured · Source: the US BTS Aug · 74.5% · 458 recorded · 454 measured · Source: the US BTS Sep · 89.2% · 454 recorded · 452 measured · Source: the US BTS Oct · 83.8% · 636 recorded · 628 measured · Source: the US BTS Nov · 79.3% · 626 recorded · 609 measured · Source: the US BTS Dec · 78.5% · 643 recorded · 636 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 · 6.7 min · 470 recorded · 458 measured · Source: the US BTS Feb · 8.3 min · 410 recorded · 393 measured · Source: the US BTS Mar · 10.9 min · 588 recorded · 585 measured · Source: the US BTS Apr · 10.2 min · 616 recorded · 613 measured · Source: the US BTS May · 24.0 min · 694 recorded · 690 measured · Source: the US BTS Jun · 14.0 min · 790 recorded · 783 measured · Source: the US BTS Jul · 29.1 min · 926 recorded · 886 measured · Source: the US BTS Aug · 18.6 min · 458 recorded · 454 measured · Source: the US BTS Sep · 5.9 min · 454 recorded · 452 measured · Source: the US BTS Oct · 8.0 min · 636 recorded · 628 measured · Source: the US BTS Nov · 13.6 min · 626 recorded · 609 measured · Source: the US BTS Dec · 11.6 min · 643 recorded · 636 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 · 470 · 470 recorded · 458 measured · Source: the US BTS Feb · 410 · 410 recorded · 393 measured · Source: the US BTS Mar · 588 · 588 recorded · 585 measured · Source: the US BTS Apr · 616 · 616 recorded · 613 measured · Source: the US BTS May · 694 · 694 recorded · 690 measured · Source: the US BTS Jun · 790 · 790 recorded · 783 measured · Source: the US BTS Jul · 926 · 926 recorded · 886 measured · Source: the US BTS Aug · 458 · 458 recorded · 454 measured · Source: the US BTS Sep · 454 · 454 recorded · 452 measured · Source: the US BTS Oct · 636 · 636 recorded · 628 measured · Source: the US BTS Nov · 626 · 626 recorded · 609 measured · Source: the US BTS Dec · 643 · 643 recorded · 636 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
Jan84.9%6.7 min458470
Feb82.2%8.3 min393410
Mar78.6%10.9 min585588
Apr83.4%10.2 min613616
May75.1%24.0 min690694
Jun77.0%14.0 min783790
Jul66.1%29.1 min886926
Aug74.5%18.6 min454458
Sep89.2%5.9 min452454
Oct83.8%8.0 min628636
Nov79.3%13.6 min609626
Dec78.5%11.6 min636643

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 77.1% 5,639
  • Delayed >15 min 21.2% 1,548
  • Cancelled 1.7% 124
  • 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

48
48 of 48
Flight numbersBy direction DeparturesOn time
UA1330 EWR → SEA 497 89.0%
UA341 SEA → EWR 490 75.4%
AS299 EWR → SEA 452 85.5%
AS462 EWR → SEA 433 73.0%
AS298 SEA → EWR 424 84.1%
UA2044 EWR → SEA 422 71.2%
AS477 SEA → EWR 416 67.4%
AS280 EWR → SEA 322 78.8%
AS314 SEA → EWR 282 72.5%
AS398 SEA → EWR 206 70.4%
AS477 EWR → SEA 202 73.2%
AS280 SEA → EWR 190 88.9%
AS281 EWR → SEA 183 86.7%
AS295 SEA → EWR 158 81.3%
UA1329 SEA → EWR 143 91.6%
AS274 SEA → EWR 138 71.7%
AS296 EWR → SEA 138 73.7%
UA1900 SEA → EWR 93 96.7%
UA1274 SEA → EWR 92 84.4%
UA2630 EWR → SEA 89 71.6%
UA2467 SEA → EWR 71 76.1%
UA1796 EWR → SEA 69 55.2%
UA2403 EWR → SEA 68 83.8%
UA2402 SEA → EWR 65 96.9%
AS283 EWR → SEA 57 80.7%
UA1238 EWR → SEA 54 77.8%
UA2606 SEA → EWR 54 46.3%
AS230 EWR → SEA 52 86.3%
AS239 SEA → EWR 52 83.7%
UA1289 EWR → SEA 52 74.5%
AS263 SEA → EWR 51 28.0%
AS356 EWR → SEA 51 79.2%
UA2100 SEA → EWR 51 79.6%
UA1187 EWR → SEA 37 83.8%
UA1558 EWR → SEA 37 91.9%
UA1708 SEA → EWR 37 58.3%
UA2357 SEA → EWR 37 100.0%
UA2374 EWR → SEA 37 94.6%
UA2387 EWR → SEA 37 58.8%
UA1894 SEA → EWR 36 42.9%
AS356 SEA → EWR 35 85.7%
AS357 EWR → SEA 35 91.4%
UA1114 SEA → EWR 35 74.3%
UA1741 EWR → SEA 35 91.4%
UA2364 EWR → SEA 35 85.7%
UA1206 SEA → EWR 32 90.6%
UA2680 SEA → EWR 32 87.5%
UA1197 SEA → EWR 31 90.3%

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 467 +11.5% 25 66.8%
June 2026 446 +32.3% 4 79.6%
May 2026 426 +61.4% 0 87.6%
April 2026 360 +42.3% 2 88.9%
March 2026 328 +27.6% 3 75.0%
February 2026 190 −6.4% 16 82.6%
January 2026 227 −1.7% 10 85.5%
December 2025 353 +24.7% 4 75.9%
November 2025 325 +14.4% 17 77.5%
October 2025 405 +81.6% 7 80.5%
September 2025 452 2 89.2%
August 2025 454 4 74.4%
July 2025 419 15 65.4%
June 2025 337 3 73.6%
May 2025 264 4 54.9%
April 2025 253 1 75.5%
March 2025 257 0 83.3%
February 2025 203 1 81.8%
January 2025 231 2 84.4%
December 2024 283 3 81.6%
November 2024 284 0 81.3%
October 2024 223 1 89.7%

How to read this chart

Loading the guide…