DAL to SEA flight delays & on-time performance
Nonstop flights from Dallas Love Field to Seattle–Tacoma International Airport · 1,670 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DAL or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Dallas (DAL) to Seattle (SEA) arrived on time 73% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0% were cancelled, and 7% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9am did best (89% on time); around 11am did worst (71%).
- Thursday was the most reliable day to fly (83% on time) and Friday the least (61%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from DAL to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 73% | 0.0% | 16 min | 6.8% | 219 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am80%55 flights
- 8am72%76 flights
- 9am89%19 flights
- 11am71%49 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%0.0% cancelled
- Tuesday70%0.0% cancelled
- Wednesday77%0.0% cancelled
- Thursday83%0.0% cancelled
- Friday61%0.0% cancelled
- Saturday66%0.0% cancelled
- Sunday73%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft41%
- Airline (crew, maintenance, cleaning, fueling)28%
- Air traffic control & airport congestion25%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
DAL to SEA: common questions
- How often are DAL to SEA flights on time?
- 73% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Dallas to Seattle cancelled?
- 0.0% of scheduled flights were cancelled (0 of 219).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 51 min behind schedule on average, and 6.8% of flights were an hour or more late.
- How long is taxi time at DAL?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to DAL — 44% on time
More flights from Dallas
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DAL → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.