What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Seattle round-trip?

According to our current data, Frontier ($256), American Airlines ($257), and Hawaiian Airlines ($277) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Seattle. These flights start at 45% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Seattle one-way?

To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $148. Southwest flights start at $149 while deals on JetBlue start at $155 one-way.

What are the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle?

The cheapest flight price from Washington, D.C. Reagan-National Airport to Seattle is $148. On average you can expect to pay $1,219. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $270.

What are the most reliable airlines from Washington, D.C. Reagan-National Airport to Seattle?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Reagan-National Airport to Seattle on time: LATAM Airlines (100%), Kenya Airways (100%), Virgin Atlantic (100%).

What are the most popular airlines that fly from Washington, D.C. Reagan-National Airport to Seattle?

The most popular airlines flying from Washington, D.C. Reagan-National Airport to Seattle are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Washington, D.C. Reagan-National Airport to Seattle?

Monday is generally a great day to depart. Flying on this day could help you save up to 24%.

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Seattle?

Flights from Washington, D.C. Reagan-National Airport to Seattle lean towards being more expensive in December. Prices are generally better when you fly from Washington, D.C. Reagan-National Airport to Seattle in September, with the cheapest ticket starting at $201.

What airport do you fly into for flights to Seattle from Washington, D.C. Reagan-National?

For a flight from Washington, D.C. Reagan-National to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 5 inbound flights from Washington, D.C. Reagan-National per day. 7 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. Reagan-National on a regular basis.

Can I find deals for flights from Reagan-National to Seattle that include hotel bookings?

Yes. In addition to deals on Reagan-National to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Reagan-National to Seattle?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Seattle.

Can I find deals for business class flights from Reagan-National to Seattle?

Yes. Cheapflights offers flight deals from Reagan-National to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$148+ Flights from Washington, D.C. Reagan-National Airport to Seattle

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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in May or January, booked 74 days in advance, depart on a Tuesday or Friday and return on a Friday

Cheap flight deals from Reagan-National to Seattle

Round-trip from	$256 (Kiwi.com)
One-way from	$148 (Alaska Airlines)
Popular in	December
Cheapest in	May
Average price	$497
Good round-trip deal	$359 or less
Good one-way deal	$198 or less

From Washington, D.C. Reagan-National to Seattle/Tacoma Intl

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One-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl

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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.

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Price to beat on a one-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.

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Find flight deals from Reagan-National to Seattle

Cheapest flights from Reagan-National to Seattle
Explore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Sat 10/116:00 pmDCA - SEA

1 stop9h 31mFrontier

Tue 10/216:00 amSEA - DCA

1 stop8h 01mFrontier

Deal found 6/10

$256

Tue 10/217:00 amDCA - SEA

1 stop8h 33mAmerican Airlines

Sun 11/211:45 amSEA - DCA

1 stop7h 15mAmerican Airlines

Deal found 6/10

$257

Sat 8/238:00 amDCA - SEA

Nonstop5h 49mHawaiian Airlines

Wed 8/271:35 pmSEA - DCA

Nonstop5h 09mHawaiian Airlines

Deal found 6/9

$277

Sat 8/238:00 amDCA - SEA

Nonstop5h 49mAlaska Airlines

Sat 8/309:53 amSEA - DCA

1 stop9h 06mAlaska Airlines

Deal found 6/9

$287

Sat 11/152:00 pmDCA - SEA

1 stop10h 19mJetBlue

Wed 12/310:29 pmSEA - DCA

1 stop11h 14mJetBlue

Deal found 6/11

$289

Sat 8/303:59 pmDCA - SEA

1 stop9h 53mUnited Airlines

Sat 9/65:07 amSEA - DCA

1 stop6h 59mUnited Airlines

Deal found 6/10

$292

Tue 9/1612:45 pmDCA - SEA

2 stops11h 30mSouthwest

Thu 9/1810:45 pmSEA - DCA

1 stop9h 20mSouthwest

Deal found 6/11

$302

Mon 9/227:45 pmDCA - SEA

1 stop16h 29mDelta

Thu 9/257:23 amSEA - DCA

Nonstop5h 12mDelta

Deal found 6/10

$350

Thu 8/218:00 amDCA - SEA

Nonstop5h 49mMultiple Airlines

Sun 8/246:17 amSEA - DCA

1 stop7h 42mMultiple Airlines

Deal found 6/12

$409

Best flights from Reagan-National to Seattle
Discover carefully curated flight deals from Reagan-National to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Sat 10/116:00 pmDCA - SEA

1 stop9h 31mFrontier

Tue 10/216:00 amSEA - DCA

1 stop8h 01mFrontier

Deal found 6/10

$256

Tue 10/217:00 amDCA - SEA

1 stop8h 33mAmerican Airlines

Sun 11/211:45 amSEA - DCA

1 stop7h 15mAmerican Airlines

Deal found 6/10

$257

Sat 8/238:00 amDCA - SEA

Nonstop5h 49mHawaiian Airlines

Wed 8/271:35 pmSEA - DCA

Nonstop5h 09mHawaiian Airlines

Deal found 6/9

$277

Sat 8/238:00 amDCA - SEA

Nonstop5h 49mAlaska Airlines

Sat 8/309:53 amSEA - DCA

1 stop9h 06mAlaska Airlines

Deal found 6/9

$287

Sat 11/152:00 pmDCA - SEA

1 stop10h 19mJetBlue

Wed 12/310:29 pmSEA - DCA

1 stop11h 14mJetBlue

Deal found 6/11

$289

Sat 8/303:59 pmDCA - SEA

1 stop9h 53mUnited Airlines

Sat 9/65:07 amSEA - DCA

1 stop6h 59mUnited Airlines

Deal found 6/10

$292

Tue 9/1612:45 pmDCA - SEA

2 stops11h 30mSouthwest

Tue 9/2310:10 amSEA - DCA

1 stop9h 50mSouthwest

Deal found 6/10

$302

Fri 8/294:40 pmDCA - SEA

Nonstop5h 55mDelta

Sun 9/77:20 amSEA - DCA

Nonstop5h 09mDelta

Deal found 6/9

$347

Sat 7/58:00 amDCA - SEA

Nonstop5h 56mMultiple Airlines

Sat 7/126:25 amSEA - DCA

1 stop7h 34mMultiple Airlines

Deal found 6/11

$394

Last-minute flights from Reagan-National to Seattle
Discover last-minute flight deals from Reagan-National to Seattle. Data last updated June 12, 2025 and is based on user searches.

Wed 6/186:30 amDCA - SEA

1 stop9h 01mAmerican Airlines

Fri 7/1811:56 pmSEA - DCA

1 stop8h 04mAmerican Airlines

Deal found 6/11

$533

Wed 6/1811:45 amDCA - SEA

2 stops11h 10mSouthwest

Fri 7/1810:55 pmSEA - DCA

1 stop8h 20mSouthwest

Deal found 6/11

$578

Wed 6/182:56 pmDCA - SEA

1 stop11h 04mUnited Airlines

Tue 7/112:20 amSEA - DCA

1 stop8h 39mUnited Airlines

Deal found 6/11

$613

Fri 6/205:02 pmDCA - SEA

Nonstop5h 58mAlaska Airlines

Thu 6/266:00 amSEA - DCA

1 stop12h 42mAlaska Airlines

Deal found 6/9

$614

Sat 6/211:00 pmDCA - SEA

1 stop8h 53mFrontier

Thu 7/36:25 amSEA - DCA

1 stop7h 32mFrontier

Deal found 6/11

$355

Sat 6/215:02 pmDCA - SEA

Nonstop5h 58mHawaiian Airlines

Thu 7/31:58 pmSEA - DCA

Nonstop5h 01mHawaiian Airlines

Deal found 6/11

$503

Sat 6/214:40 pmDCA - SEA

Nonstop5h 58mDelta

Fri 7/47:20 amSEA - DCA

Nonstop5h 10mDelta

Deal found 6/10

$513

Sun 6/227:00 amDCA - SEA

1 stop14h 53mMultiple Airlines

Thu 6/261:58 pmSEA - DCA

Nonstop5h 01mMultiple Airlines

Deal found 6/10

$584

Fri 7/44:40 pmDCA - SEA

Nonstop5h 58mDelta

Wed 7/237:15 amSEA - DCA

1 stop13h 20mDelta

Deal found 6/9

$336

Mon 7/75:14 pmDCA - SEA

1 stop8h 41mAmerican Airlines

Fri 7/1111:56 pmSEA - DCA

1 stop8h 04mAmerican Airlines

Deal found 6/11

$338

Tue 7/85:02 pmDCA - SEA

Nonstop5h 58mAlaska Airlines

Tue 7/159:40 pmSEA - DCA

1 stop17h 18mAlaska Airlines

Deal found 6/10

$307

Wed 7/91:44 pmDCA - SEA

1 stop11h 20mJetBlue

Wed 7/169:13 pmSEA - DCA

1 stop9h 28mJetBlue

Deal found 6/11

$289

One-way flights from Reagan-National to Seattle
Search for one-way flight options from Reagan-National to Seattle. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Tue 8/265:49 pmDCA - SEA

1 stop7h 40mAlaska Airlines

Deal found 6/10

$148

Tue 8/56:00 amDCA - SEA

1 stop10h 40mSouthwest

Deal found 6/9

$149

Mon 7/211:44 pmDCA - SEA

1 stop11h 20mJetBlue

Deal found 6/10

$155

Fri 7/44:40 pmDCA - SEA

Nonstop5h 58mDelta

Deal found 6/10

$159

Thu 9/48:59 amDCA - SEA

1 stop10h 51mHawaiian Airlines

Deal found 6/11

$168

Fri 8/86:00 pmDCA - SEA

1 stop9h 34mFrontier

Deal found 6/10

$170

Tue 7/15:00 pmDCA - SEA

1 stop9h 59mUnited Airlines

Deal found 6/10

$209

Sat 7/122:35 pmDCA - SEA

2 stops13h 08mAmerican Airlines

Deal found 6/10

$214

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 8/20

1:00 pm-11:01 pm

1 stop13h 01m

Seattle/Tacoma Intl

Sun 8/24

6:17 am-4:59 pm

1 stop7h 42m

$261

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 8/13

6:00 pm-11:40 pm

1 stop8h 40m

Seattle/Tacoma Intl

Wed 8/20

1:55 pm-1:16 am

1 stop8h 21m

$267

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 8/23

4:40 pm-7:35 pm

Nonstop5h 55m

Seattle/Tacoma Intl

Wed 8/27

7:20 am-3:29 pm

Nonstop5h 09m

$277

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 8/23

8:00 am-10:49 am

Nonstop5h 49m

Seattle/Tacoma Intl

Sat 8/30

9:53 am-9:59 pm

1 stop9h 06m

$287

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 7/9

1:44 pm-10:04 pm

1 stop11h 20m

Seattle/Tacoma Intl

Wed 7/16

9:13 pm-9:41 am

1 stop9h 28m

$289

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 8/30

3:59 pm-10:52 pm

1 stop9h 53m

Seattle/Tacoma Intl

Sat 9/6

5:07 am-3:06 pm

1 stop6h 59m

$292

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 9/3

8:59 am-2:48 pm

1 stop8h 49m

Seattle/Tacoma Intl

Tue 9/9

9:53 am-9:59 pm

1 stop9h 06m

$296

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 8/11

4:35 pm-12:15 am

2 stops10h 40m

Seattle/Tacoma Intl

Mon 8/18

11:10 pm-10:00 am

1 stop7h 50m

$302

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 7/5

8:00 am-10:56 am

Nonstop5h 56m

Seattle/Tacoma Intl

Sat 7/12

6:25 am-4:59 pm

1 stop7h 34m

$394

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 8/26

5:49 pm-10:29 pm

1 stop7h 40m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 17 results

The best insider tips for Washington, D.C. Reagan-National Airport to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Reagan-National Airport to Seattle trip

Airports

DCA

For a stress-free departure, use DCA's Metro stop on the Yellow and Blue lines for easy and affordable access.

SEA

Take the Link light rail from SEA to downtown Seattle for an inexpensive, 40-minute journey with ample luggage space.

Our travel experts

Emily Zemler

Expert on DCA

Brandon Schultz

Expert on SEA

Best time to book a flight from Reagan-National to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Reagan-National with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Seattle

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Seattle?

The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $238). Flying from Washington, D.C. Reagan-National Airport to Seattle in July is currently the most expensive (average of $391). 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.

What is the cheapest time of day to fly from DCA to SEA?

Unlike in the morning, when flights are generally more expensive, you can save up to 32% on flights from Washington, D.C. Reagan-National Airport to Seattle by exploring options for tickets in the evening.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Seattle?

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Seattle flight should consider departing on Monday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Reagan-National Airport to Seattle

The most flights from DCA to SEA are scheduled on a Wednesday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Seattle by month

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Washington, D.C. to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,287 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,946 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.9

Good

2,494 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,790 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What airport do you fly into for flights to Seattle from Washington, D.C. Reagan-National?
For a flight from Washington, D.C. Reagan-National to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 5 inbound flights from Washington, D.C. Reagan-National per day. 7 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. Reagan-National on a regular basis.
What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Seattle round-trip?
According to our current data, Frontier ($256), American Airlines ($257), and Hawaiian Airlines ($277) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Seattle. These flights start at 45% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Seattle one-way?
To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $148. Southwest flights start at $149 while deals on JetBlue start at $155 one-way.
What are the most reliable airlines from Washington, D.C. Reagan-National Airport to Seattle?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Reagan-National Airport to Seattle on time: LATAM Airlines (100%), Kenya Airways (100%), Virgin Atlantic (100%).
What are the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle?
The cheapest flight price from Washington, D.C. Reagan-National Airport to Seattle is $148. On average you can expect to pay $1,219. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $270.
Can I find deals for flights from Reagan-National to Seattle that include hotel bookings?
Yes. In addition to deals on Reagan-National to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Reagan-National to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Seattle.
Can I find deals for business class flights from Reagan-National to Seattle?
Yes. Cheapflights offers flight deals from Reagan-National to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $238). Flying from Washington, D.C. Reagan-National Airport to Seattle in July is currently the most expensive (average of $391). 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.

See more FAQs

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Alternative routes for Reagan-National to Seattle

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Other flights to Seattle

Top 7 airlines flying from Reagan-National to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$136	Average$292	FlexibilityNo cancel fee	On-time62%
Hawaiian Airlines	Cheapest$168	Average$522	FlexibilityNo cancel fee	On-time85%
Delta	Cheapest$241	Average$432	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$282	Average$406	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$291	Average$477	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$306	Average$503	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$316	Average$549	FlexibilityNo cancel fee	On-time75%

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$148+ Cheap flights from Reagan-National (DCA) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Reagan-National to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in May or January, booked 74 days in advance, depart on a Tuesday or Friday and return on a Friday

Cheap flight deals from Reagan-National to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Reagan-National to Seattle

Cheapest flights from Reagan-National to SeattleExplore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Seattle that are best for you.

The best insider tips for Washington, D.C. Reagan-National Airport to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Reagan-National Airport to Seattle trip

Airports

DCA

SEA

Our travel experts

Best time to book a flight from Reagan-National to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Reagan-National with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Seattle

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Reagan-National to Seattle. Price data was last updated on June 9, 2025.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?

What is the cheapest time of day to fly from DCA to SEA?

Find hourly flight availability from Reagan-National to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Seattle. Price data was last updated on June 8, 2025.

Weekly flight availability from Washington, D.C. Reagan-National Airport to Seattle

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

Temperature in Seattle by month

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Reviews of airlines servicing Seattle

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Washington, D.C. to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from Washington, D.C. Reagan-National?

What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Seattle round-trip?

What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Seattle one-way?

What are the most reliable airlines from Washington, D.C. Reagan-National Airport to Seattle?

What are the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle?

Can I find deals for flights from Reagan-National to Seattle that include hotel bookings?

How can I find direct flights from Reagan-National to Seattle?

Can I find deals for business class flights from Reagan-National to Seattle?

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?

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Alternative routes for Reagan-National to Seattle

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Top 7 airlines flying from Reagan-National to Seattle

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Cheapest flights from Reagan-National to Seattle
Explore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.