PlainFlights

Route · SEA → DAL · 2020–2025 BTS data

Seattle to Dallas

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to DAL (Seattle to Dallas) ranks #3873 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

75.3%
On-time
-3.7 pts
vs US avg
50 min
Delay when late
1,922
Flights
#3873 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Jul 2023 85%

Worst Month

Aug 2023 77%

Distance

1,670 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Sep 2025 30 10 0 0 WN
Aug 2025 32 12 0 0 WN
Jul 2025 35 22 0 2 WN
Jun 2025 30 16 0 0 WN
Dec 2024 31 6 0 0 AS
Oct 2024 31 4 0 0 AS
Sep 2024 39 7 0 0 WN,AS
Aug 2024 41 11 0 0 AS,WN
Jul 2024 43 5 0 0 AS,WN
Jun 2024 40 4 0 0 AS,WN
Apr 2024 30 4 0 0 AS
Mar 2024 31 6 1 0 AS
Dec 2023 31 4 0 0 AS
Oct 2023 31 4 0 0 AS
Sep 2023 36 3 0 0 AS,WN
Aug 2023 64 15 0 0 AS,WN
Jul 2023 67 10 0 0 AS,WN
Jun 2023 49 13 0 1 AS,WN
May 2023 31 8 0 0 AS
Apr 2023 30 7 0 0 AS
Dec 2022 36 14 6 0 AS,WN
Nov 2022 32 4 2 1 WN,AS
Oct 2022 31 3 0 0 AS
Sep 2022 31 3 0 1 WN,AS

SEA–DAL seasonal on-time pattern

Best: November (87.1%) · weakest: June (62.7%)

60%70%80%90% JanMarAprMayJunJulAugSepOctNovDec 83.5%

Strongest calendar month

November

87.1% on-time · ~39 flights/mo

Busiest calendar month

June

~51 flights/mo avg

Weakest calendar month

June

62.7% on-time · ~51 flights/mo

Cancellation Rate

1.0%

9 of 882 flights

Diversion Rate

0.6%

5 of 882 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

DAL - Dallas

Full on-time, delay-cause, and seasonal performance for Dallas, TX.

DAL on-time profile

Compare the two airports

See SEA and DAL side by side on delays, cancellations, and reliability.

Compare SEA vs DAL

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Dallas · fleet on-time rank #4431 of 4927.

What the Data Says About SEA to DAL

The Seattle to Dallas corridor (SEA to DAL) posts a 75.3% on-time rate on the lower edge of the average band, based on 1,922 tracked flights. Late flights run 49.6 minutes behind on average. 4 carriers cover the 1,670-mile route; over the last 24 months, 9 of 882 flights were cancelled (1.0%) and 0.6% diverted.

Monthly performance varies moderately here: Jul 2023 was the strongest month at 85% on-time versus Aug 2023 at 77%, a 9-point difference.

On the multi-year calendar, SEA–DAL peaks in November at 87.1% on-time while June carries the heaviest traffic (~51 flights per month) ; the softest month is June at 62.7%, a 24.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to DAL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to DAL ranks #3873 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to DAL? ▼
Flights from Seattle to Dallas have a 75.3% on-time rate based on 1,922 flights. The average delay is 49.6 minutes. The best recent month was Jul 2023 with 85% on-time.
What is the cancellation rate for SEA to DAL? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (9 of 882 flights) and 0.6% were diverted.
How far is the flight from SEA to DAL? ▼
The flight distance from Seattle (SEA) to Dallas (DAL) is approximately 1,670 miles. This route is served by 4 carriers.
When is the best time to fly from SEA to DAL? ▼
The best recent month for on-time performance was Jul 2023 (85% on-time). The worst was Aug 2023 (77% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
DAL Airport

Dallas
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–DAL data

SEA–DAL is mid-pack at 75.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and DAL airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, November (87.1% on-time) beats June (62.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 75.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.