Dallas (DFW) to Seattle (SEA) flight prices

A quick snapshot of Dallas (DFW) to Seattle (SEA) fares — lowest and typical prices plus the cheapest months and weekdays to fly, the airlines on the route and the usual duration.

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Price graph and price trends for Dallas Fort Worth International-Seattle Tacoma International

Weekly price trend

Today

2027

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Week

17

21

25

29

33

37

41

45

49

53

4

USD 44–79

USD 80–114

USD 115–150

USD 151–185

USD 186–222

Monthly price summary

MarchBest price

April

May

June

July

August

September

October

November

December

January

FebruaryMost expensive

Ticket prices for Dallas to Seattle (March 2026 - March 2027) are shown here with weekly or monthly averages to indicate cheaper and more expensive periods.

Source: Flightprices.com & Kayak.com
Forecast updated: September 16, 2025.

Flight information

DFW → SEA

Flight frequency

115 flights/week

Type

Direct flight

Duration

4 hours 21 minutes

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Airlines with non-stop flights on this route:

American Airlines Alaska Airlines Delta

FAQ – Dallas (DFW) → Seattle (SEA)

Are there any low-cost airlines with flights from Dallas (DFW) to Seattle (SEA)?

No dedicated low-cost airlines fly directly between Dallas and Seattle. Instead, full-service carriers such as American Airlines, Alaska Airlines and Delta operate this route.

Which is the cheapest month to fly between Dallas Fort Worth International and Seattle Tacoma International?

Based on recent price logs, the cheapest month(s) is June 2026. Use the monthly view above to spot the dip weeks.

What day of the week is usually cheapest on this route?

Based on price logs for the next 12 months, the cheapest day(s) to depart is Wednesday. Compare weekdays in the fare calendar to target these departures.

Is roundtrip cheaper than two one-way tickets for DFW-SEA?

Usually yes, but not always. Check both options — you can easily switch between them in our widget.

How far in advance should I book to get the best price?

For domestic routes like DFW-SEA, good deals often appear a few weeks out. Watch for sales and avoid peak dates.

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Dallas (DFW)

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Roundtrip One way

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Adults

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Children (3–11)

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Youth (12–17)

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Infants (0–2)

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Class

Economy Premium Business First

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