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2,391 km · Domestic

Kansas City (MCI) – Seattle–Tacoma (SEA)

In July 2026, 254 flights operated between Kansas City and Seattle–Tacoma (both directions), and 82.3% 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
January124133▲ 7.3%
February124110▼ 11.3%
March156147▼ 5.8%
April168179▲ 6.5%
May209216▲ 3.3%
June245246▲ 0.4%
July2542540.0%
August240––
September219––
October172–in progress
November158––
December166––
Year to date (Jan–Jul)1,2801,285▲ 0.4%

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
January86.3%88.0%▲ 2.0%
February83.1%89.1%▲ 7.2%
March88.5%91.2%▲ 3.1%
April92.3%91.6%▼ 0.8%
May81.8%88.4%▲ 8.1%
June74.7%83.3%▲ 11.5%
July76.4%82.3%▲ 7.7%
August80.0%––
September84.0%––
October82.0%–in progress
November85.4%––
December75.9%––
Year-to-date average (Jan–Jul)83.3%87.7%▲ 5.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January112▼ 81.8%
February220.0%
March12▲ 100.0%
April21▼ 50.0%
May12▲ 100.0%
June30▼ 100.0%
July00–
August2––
September3––
October4–in progress
November0––
December4––
Year to date (Jan–Jul)209▼ 55.0%

Airlines on this route

  1. Alaska Airlines 65.5%
  2. Delta Air Lines 32.8%
  3. Southwest Airlines 1.7%

Oct 1, 2024 – Jul 31, 2026

By direction

MCI → SEA

Scheduled flights
2,000
Flights operated
1,976
Cancelled
24 · 1.2%
On-time departures
88.2%

SEA → MCI

Scheduled flights
2,000
Flights operated
1,982
Cancelled
18 · 0.9%
On-time departures
80.3%

MCI → SEA and SEA → MCI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 2,620 65.5% 84.9% 22
Delta Air Lines DL 1,312 32.8% 84.1% 20
Southwest Airlines WN 68 1.7% 60.3% 0

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 delay14:00–15:000.9min · 388 recorded · 383 measured
Gap to highest-delay hour14.7min14:00 ↔ 17:00
Recorded flights4,000MCI–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 · 92.3% · 462 recorded · 456 measured · Source: the US BTS 07:00 · 91.8% · 798 recorded · 788 measured · Source: the US BTS 08:00 · 91.1% · 353 recorded · 350 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 178 recorded · 177 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 28 recorded · 28 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS 14:00 · 91.1% · 388 recorded · 383 measured · Source: the US BTS 15:00 · 80.2% · 223 recorded · 222 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 19 recorded · 18 measured · Source: the US BTS 17:00 · 76.4% · 482 recorded · 475 measured · Source: the US BTS 18:00 · 77.3% · 646 recorded · 639 measured · Source: the US BTS 19:00 · 72.1% · 205 recorded · 204 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 · 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 · 4.0 min · 462 recorded · 456 measured · Source: the US BTS 07:00 · 3.3 min · 798 recorded · 788 measured · Source: the US BTS 08:00 · 2.3 min · 353 recorded · 350 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 178 recorded · 177 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 28 recorded · 28 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS 14:00 · 0.9 min · 388 recorded · 383 measured · Source: the US BTS 15:00 · 11.2 min · 223 recorded · 222 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 19 recorded · 18 measured · Source: the US BTS 17:00 · 15.6 min · 482 recorded · 475 measured · Source: the US BTS 18:00 · 10.6 min · 646 recorded · 639 measured · Source: the US BTS 19:00 · 10.0 min · 205 recorded · 204 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 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS

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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 · 462 · 462 recorded · 456 measured · Source: the US BTS 07:00 · 798 · 798 recorded · 788 measured · Source: the US BTS 08:00 · 353 · 353 recorded · 350 measured · Source: the US BTS 09:00 · 178 · 178 recorded · 177 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 31 · 31 recorded · 31 measured · Source: the US BTS 12:00 · 28 · 28 recorded · 28 measured · Source: the US BTS 13:00 · 186 · 186 recorded · 186 measured · Source: the US BTS 14:00 · 388 · 388 recorded · 383 measured · Source: the US BTS 15:00 · 223 · 223 recorded · 222 measured · Source: the US BTS 16:00 · 19 · 19 recorded · 18 measured · Source: the US BTS 17:00 · 482 · 482 recorded · 475 measured · Source: the US BTS 18:00 · 646 · 646 recorded · 639 measured · Source: the US BTS 19:00 · 205 · 205 recorded · 204 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 · 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———
06:0092.3%4.0 min456462
07:0091.8%3.3 min788798
08:0091.1%2.3 min350353
09:00Fewer than 200 measured departures—177178
10:00No observations———
11:00Fewer than 200 measured departures—3131
12:00Fewer than 200 measured departures—2828
13:00Fewer than 200 measured departures—186186
14:0091.1%0.9 min383388
15:0080.2%11.2 min222223
16:00Fewer than 200 measured departures—1819
17:0076.4%15.6 min475482
18:0077.3%10.6 min639646
19:0072.1%10.0 min204205
20:00No observations———
21:00No observations———
22:00No observations———
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 · 84.8% · 594 recorded · 585 measured · Source: the US BTS Tuesday · 85.7% · 541 recorded · 540 measured · Source: the US BTS Wednesday · 85.9% · 545 recorded · 544 measured · Source: the US BTS Thursday · 83.9% · 593 recorded · 591 measured · Source: the US BTS Friday · 82.7% · 596 recorded · 590 measured · Source: the US BTS Saturday · 82.9% · 525 recorded · 513 measured · Source: the US BTS Sunday · 83.9% · 606 recorded · 595 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 · 5.4 min · 594 recorded · 585 measured · Source: the US BTS Tuesday · 6.6 min · 541 recorded · 540 measured · Source: the US BTS Wednesday · 5.7 min · 545 recorded · 544 measured · Source: the US BTS Thursday · 7.3 min · 593 recorded · 591 measured · Source: the US BTS Friday · 11.6 min · 596 recorded · 590 measured · Source: the US BTS Saturday · 7.2 min · 525 recorded · 513 measured · Source: the US BTS Sunday · 6.9 min · 606 recorded · 595 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 · 594 · 594 recorded · 585 measured · Source: the US BTS Tuesday · 541 · 541 recorded · 540 measured · Source: the US BTS Wednesday · 545 · 545 recorded · 544 measured · Source: the US BTS Thursday · 593 · 593 recorded · 591 measured · Source: the US BTS Friday · 596 · 596 recorded · 590 measured · Source: the US BTS Saturday · 525 · 525 recorded · 513 measured · Source: the US BTS Sunday · 606 · 606 recorded · 595 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday84.8%5.4 min585594
Tuesday85.7%6.6 min540541
Wednesday85.9%5.7 min544545
Thursday83.9%7.3 min591593
Friday82.7%11.6 min590596
Saturday82.9%7.2 min513525
Sunday83.9%6.9 min595606

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 · 87.2% · 270 recorded · 257 measured · Source: the US BTS Feb · 85.9% · 238 recorded · 234 measured · Source: the US BTS Mar · 89.8% · 306 recorded · 303 measured · Source: the US BTS Apr · 91.9% · 350 recorded · 347 measured · Source: the US BTS May · 85.2% · 428 recorded · 425 measured · Source: the US BTS Jun · 79.0% · 494 recorded · 491 measured · Source: the US BTS Jul · 79.3% · 508 recorded · 508 measured · Source: the US BTS Aug · 80.0% · 242 recorded · 240 measured · Source: the US BTS Sep · 84.0% · 222 recorded · 219 measured · Source: the US BTS Oct · 86.5% · 286 recorded · 282 measured · Source: the US BTS Nov · 86.4% · 316 recorded · 316 measured · Source: the US BTS Dec · 81.0% · 340 recorded · 336 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 · 270 recorded · 257 measured · Source: the US BTS Feb · 5.9 min · 238 recorded · 234 measured · Source: the US BTS Mar · 2.7 min · 306 recorded · 303 measured · Source: the US BTS Apr · 3.1 min · 350 recorded · 347 measured · Source: the US BTS May · 4.6 min · 428 recorded · 425 measured · Source: the US BTS Jun · 8.9 min · 494 recorded · 491 measured · Source: the US BTS Jul · 11.7 min · 508 recorded · 508 measured · Source: the US BTS Aug · 11.2 min · 242 recorded · 240 measured · Source: the US BTS Sep · 8.5 min · 222 recorded · 219 measured · Source: the US BTS Oct · 7.5 min · 286 recorded · 282 measured · Source: the US BTS Nov · 4.0 min · 316 recorded · 316 measured · Source: the US BTS Dec · 10.3 min · 340 recorded · 336 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 · 270 · 270 recorded · 257 measured · Source: the US BTS Feb · 238 · 238 recorded · 234 measured · Source: the US BTS Mar · 306 · 306 recorded · 303 measured · Source: the US BTS Apr · 350 · 350 recorded · 347 measured · Source: the US BTS May · 428 · 428 recorded · 425 measured · Source: the US BTS Jun · 494 · 494 recorded · 491 measured · Source: the US BTS Jul · 508 · 508 recorded · 508 measured · Source: the US BTS Aug · 242 · 242 recorded · 240 measured · Source: the US BTS Sep · 222 · 222 recorded · 219 measured · Source: the US BTS Oct · 286 · 286 recorded · 282 measured · Source: the US BTS Nov · 316 · 316 recorded · 316 measured · Source: the US BTS Dec · 340 · 340 recorded · 336 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan87.2%6.7 min257270
Feb85.9%5.9 min234238
Mar89.8%2.7 min303306
Apr91.9%3.1 min347350
May85.2%4.6 min425428
Jun79.0%8.9 min491494
Jul79.3%11.7 min508508
Aug80.0%11.2 min240242
Sep84.0%8.5 min219222
Oct86.5%7.5 min282286
Nov86.4%4.0 min316316
Dec81.0%10.3 min336340

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 83.4% 3,334
  • Delayed >15 min 15.6% 624
  • Cancelled 1.1% 42
  • 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

14
14 of 14
Flight numbersBy direction DeparturesOn time
DL2105 MCI → SEA 656 90.7%
DL2256 SEA → MCI 656 77.4%
AS563 MCI → SEA 464 94.3%
AS418 MCI → SEA 411 85.8%
AS418 SEA → MCI 406 87.2%
AS564 SEA → MCI 384 76.3%
AS291 MCI → SEA 150 87.0%
AS296 SEA → MCI 149 84.3%
AS501 MCI → SEA 122 86.1%
AS357 SEA → MCI 113 83.2%
AS357 MCI → SEA 93 72.8%
AS497 SEA → MCI 80 77.5%
AS501 SEA → MCI 77 93.5%
AS484 SEA → MCI 76 79.0%

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 254 +0.0% 0 82.3%
June 2026 246 +0.4% 0 83.3%
May 2026 216 +3.3% 2 88.4%
April 2026 179 +6.5% 1 91.6%
March 2026 147 −5.8% 2 91.2%
February 2026 110 −11.3% 2 89.1%
January 2026 133 +7.3% 2 88.0%
December 2025 166 −2.4% 4 75.9%
November 2025 158 +0.0% 0 85.4%
October 2025 172 +56.4% 4 82.0%
September 2025 219 3 84.0%
August 2025 240 2 80.0%
July 2025 254 0 76.4%
June 2025 245 3 74.7%
May 2025 209 1 81.8%
April 2025 168 2 92.3%
March 2025 156 1 88.5%
February 2025 124 2 83.1%
January 2025 124 11 86.3%
December 2024 170 0 85.9%
November 2024 158 0 87.3%
October 2024 110 0 93.6%

How to read this chart

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