Alaska Airlines offers 32” legroom in Main Cabin, ideal for medium-haul comfort.
Alaska Airlines provides flat-fee Wi-Fi, perfect for staying productive on longer flights.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $171 (Kiwi.com) |
One-way from | $100 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $227 |
Good round-trip deal | $274 or less |
Good one-way deal | $184 or less |
Fly from
Fly to
Route
Depart
Return
Price
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Sun 3/1
6:00 am-8:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Wed 3/4
12:30 pm-6:27 pm
Nonstop3h 57m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Wed 2/18
6:00 am-8:33 am
Nonstop4h 33m
Seattle/Tacoma Intl
Wed 2/25
9:25 am-3:19 pm
Nonstop3h 54m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Sat 2/14
9:00 am-11:40 am
Nonstop4h 40m
Seattle/Tacoma Intl
Wed 2/18
6:01 pm-11:59 pm
Nonstop3h 58m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Sat 2/14
6:00 am-8:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Fri 2/20
10:51 pm-4:40 am
Nonstop3h 49m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Fri 2/27
6:00 am-8:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Sun 3/1
10:51 pm-4:40 am
Nonstop3h 49m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Wed 3/11
6:00 am-8:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Sat 3/14
10:51 pm-4:40 am
Nonstop3h 49m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Sun 3/8
6:00 am-8:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Wed 3/11
10:51 pm-4:40 am
Nonstop3h 49m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Mon 3/9
4:23 pm-11:52 pm
1 stop9h 29m
Seattle/Tacoma Intl
Sat 3/14
1:30 pm-11:52 pm
1 stop8h 22m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Sat 2/14
9:00 am-11:40 am
Nonstop4h 40m
Seattle/Tacoma Intl
Tue 2/17
7:45 am-4:39 pm
1 stop6h 54m
DallasSeattle
DFW - SEA
DFWSEA
Dallas/Fort Worth
Fri 2/6
4:54 pm-10:33 pm
1 stop7h 39m
Seattle/Tacoma Intl
Tue 2/10
3:50 pm-9:49 pm
Nonstop3h 59m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
Booking 38 days in advance of your planned departure date is, on average, the best time to get cheap flights from Dallas/Fort Worth Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, March is the cheapest month in which you can book a flight from Dallas/Fort Worth Airport to Seattle (average of $66). Flying from Dallas/Fort Worth Airport to Seattle in June is currently the most expensive (average of $163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s optimal to fly from Dallas/Fort Worth Airport to Seattle in the morning. By choosing this option you can save up to 8% on the cost of your flight, compared to a flight in the evening.
Travelers seeking maximum savings on their Dallas/Fort Worth Airport to Seattle flight should consider departing on Friday mornings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
About 21% of weekly flights between Dallas and Seattle have experienced delays in the past year, with the average delay time being 160 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Frontier have had the lowest number of delays on this route, with just 12% of flights being delayed.
Denver (DEN) – chosen by Cheapflights users on 80% of 1-stop itineraries from Dallas/Fort Worth Airport to Seattle on Cheapflights.
Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $164.
Flights via Las Vegas (LAS) have the shortest average one-way travel time for 1-stop routes: 7h 30m.
Flights via Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 2h 46m.
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Anonymous,Dec 2025
SJC - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$69 | Average$206 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$76 | Average$152 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$108 | Average$267 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$119 | Average$274 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$161 | Average$316 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$306 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$181 | Average$312 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$183 | Average$323 | FlexibilityNo cancel fee | On-time71% |