Cheap flights from Seattle to Dulles from $0
Compare prices across airlines and find the best deals
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Discover deals on Seattle to Dulles flights
Typical range $0–$0•Cheapest found $0
Checking latest prices...Find cheap flights from Seattle to Dulles
Best
8 Feb
DEP
08:30
SEA
16:26
IAD
4h 56m
8 Feb
DEPARTURE
08:30 - 16:26
4h 56m
SEA
IAD
8 Feb
DEP
08:30
SEA
16:26
IAD
4h 56m
8 Feb
DEPARTURE
08:30 - 16:26
4h 56m
SEA
IAD
American Airlines flights from Seattle to Dulles
Our best American Airlines deals on Seattle to Dulles tickets
Best
1 stop
8 Feb
DEP
06:00
SEA
1×
16:31
IAD
7h 31m
8 Feb
DEPARTURE
06:00 - 16:31
7h 31m
SEA
1 stop
IAD
1 stop
8 Feb
DEP
07:00
SEA
1×
17:16
IAD
7h 16m
8 Feb
DEPARTURE
07:00 - 17:16
7h 16m
SEA
1 stop
IAD
Alaska Airlines flights from Seattle to Dulles
Our best Alaska Airlines deals on Seattle to Dulles tickets
Best
8 Feb
DEP
08:30
SEA
16:26
IAD
4h 56m
8 Feb
DEPARTURE
08:30 - 16:26
4h 56m
SEA
IAD
8 Feb
DEP
08:30
SEA
16:26
IAD
4h 56m
8 Feb
DEPARTURE
08:30 - 16:26
4h 56m
SEA
IAD
Hawaiian Airlines flights from Seattle to Dulles
Our best Hawaiian Airlines deals on Seattle to Dulles tickets
Best
8 Feb
DEP
08:30
SEA
16:26
IAD
4h 56m
8 Feb
DEPARTURE
08:30 - 16:26
4h 56m
SEA
IAD
What's the cheapest day of the week to fly from Seattle to Dulles?
If your flying dates are flexible, you should consider flying to Dulles on a Wed, as we generally find the cheapest rates on that day. On the other hand, Fri is the most expensive day to fly.
What is the cheapest month to fly from Seattle to Dulles?
The cheapest month for flights from Seattle to Dulles is Sep, where tickets cost $432 on average. The most expensive months are Jul.
JanFebMarAprMayJunJulAugSepOctNovDec
$623$528$432
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Everything you should know
Cheapest one-way flight
$461
Typical prices: $461–$761
When to book
6 weeks
in advance to save around 35%
Good to know
💰
Save money
Compare prices across airlines to find the best deal. Prices can vary significantly.
📅
Be flexible
Flying midweek or in off-peak seasons can save you up to 30% on airfare.
⏰
Book early
Booking 6+ weeks in advance typically offers the best prices.
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Frequently asked questions
The cheapest flight from Seattle to Dulles currently costs AUD $461. Prices typically range from $461 to $761. Prices change frequently, so we recommend booking early and being flexible with your travel dates.