How popular is this Baltimore to Seattle flight route?

The Baltimore/Washington to Seattle/Tacoma Intl flight path was viewed by 29 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines flying from Baltimore to Seattle round-trip?

According to our current data, Hawaiian Airlines ($251), United Airlines ($257), and American Airlines ($262) offers the cheapest pricing from Baltimore to Seattle. Hawaiian Airlines is 39% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Baltimore to Seattle one-way?

One-way options have recently been found by users for as low as $147 on Frontier. Other airlines that offer cheap prices include Southwest from $148 and Sun Country Air from $153 one-way.

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.

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).

What are the cheapest flights from Baltimore to Seattle?

The cheapest flight price from Baltimore to Seattle is $138. On average you can expect to pay $1,257. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $207.

What are the most reliable airlines from Baltimore to Seattle?

Consider Finnair (94%), Southwest (67%) or Alaska Airlines (63%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Seattle.

What are the most popular airlines that fly from Baltimore to Seattle?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Baltimore to Seattle.

Where are the most common layover locations when flying from Baltimore to Seattle?

Most of the time, Baltimore to Seattle flights that have layovers will stop in Chicago.

Where are the least popular layover locations for Baltimore to Seattle flights?

Baltimore to Seattle flights have a layover in Minneapolis least often.

What are some popular things to do or see while on a layover in Chicago?

Most Chicago visitors opt to spend their time experiencing Magnificent Mile, River North, and Grant Park. Magnificent Mile, River North, and Grant Park are located about 15.5 mi, 15.0 mi, and 16.2 mi, respectively from Chicago O'Hare Intl. Travelers can rent a car at Chicago O'Hare Intl for an average daily rate of $69 to make sightseeing during their layover a little easier.

What is the cheapest day to fly round-trip from Baltimore to Seattle?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Baltimore to Seattle?

Travelers have found it’s best to book a flight 44 days in advance to save up to 92% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 44 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Baltimore to Seattle 1-2 weeks in advance for as low as $561, or $625 for flights within the next 24 hours.

What is the cheapest month to fly from Baltimore to Seattle?

The best pricing can be found in the month of September. Prices to Seattle from Baltimore average $404. You can even find prices in September for less than $404, as users have found deals to Seattle from as low as $189. The month of December appears to be one of the more expensive times to travel to Seattle from Baltimore. Flying in the targeted month can save you up to 21%.

What airports do I use to fly from Baltimore to Seattle?

To fly from Baltimore to Seattle, you need to book a flight from Baltimore/Washington (BWI) to Seattle/Tacoma Intl (SEA). Nonstop flights to Seattle/Tacoma Intl from Baltimore/Washington take 5h 40m on average. When it comes time to book airfare, you have a few options: there are 7 outbound flights from Baltimore/Washington to Seattle/Tacoma Intl offered by 9 different airlines.

Can I find deals for flights from Baltimore to Seattle that include hotel bookings?

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

How can I find direct flights from Baltimore to Seattle?

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

Can I find deals for business class flights from Baltimore to Seattle?

Yes. Cheapflights offers flight deals from Baltimore 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.

$147+ Flights from Baltimore to Seattle

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1. Tell us where you want to go

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2. Select your favorite providers

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Cheapflights Tip: The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or September, booked 24 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from Baltimore to Seattle

Round-trip from	$251 (Kissandfly.com)
One-way from	$147 (Cheapflightsfares)
Popular in	December
Cheapest in	January
Average price	$509

From Baltimore/Washington to Seattle/Tacoma Intl

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One-way flight from Baltimore/Washington to Seattle/Tacoma Intl

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High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Baltimore to Seattle

Cheapest flights from Baltimore to Seattle
Explore the most affordable flight options available from Baltimore to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Mon 8/187:10 pmBWI - SEA

Nonstop5h 57mHawaiian Airlines

Tue 8/2611:23 amSEA - BWI

1 stop9h 33mHawaiian Airlines

Deal found 7/27

$251

Fri 8/224:20 pmBWI - SEA

1 stop9h 39mUnited Airlines

Fri 8/2911:54 pmSEA - BWI

1 stop7h 01mUnited Airlines

Deal found 7/25

$257

Sat 8/165:26 pmBWI - SEA

1 stop28h 20mFrontier

Sat 8/3012:40 pmSEA - BWI

1 stop26h 17mFrontier

Deal found 7/28

$259

Mon 9/15:38 pmBWI - SEA

1 stop8h 15mAmerican Airlines

Tue 9/1611:38 pmSEA - BWI

1 stop7h 35mAmerican Airlines

Deal found 7/25

$262

Tue 9/97:00 amBWI - SEA

Nonstop5h 40mAlaska Airlines

Tue 9/169:29 pmSEA - BWI

Nonstop5h 10mAlaska Airlines

Deal found 7/26

$263

Tue 9/97:15 amBWI - SEA

1 stop10h 28mDelta

Tue 9/1611:40 pmSEA - BWI

1 stop7h 56mDelta

Deal found 7/25

$269

Fri 8/15:26 pmBWI - SEA

1 stop10h 08mMultiple Airlines

Wed 8/65:30 pmSEA - BWI

2 stops21h 02mMultiple Airlines

Deal found 7/26

$273

Mon 8/186:45 pmBWI - SEA

Nonstop5h 45mSouthwest

Tue 8/264:10 pmSEA - BWI

1 stop10h 00mSouthwest

Deal found 7/27

$287

Fri 10/2412:33 pmBWI - SEA

1 stop7h 28mSun Country Air

Sun 10/266:16 pmSEA - BWI

1 stop14h 04mSun Country Air

Deal found 7/27

$289

Best flights from Baltimore to Seattle
Discover carefully curated flight deals from Baltimore to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Mon 8/187:10 pmBWI - SEA

Nonstop5h 57mHawaiian Airlines

Tue 8/2611:23 amSEA - BWI

1 stop9h 33mHawaiian Airlines

Deal found 7/27

$251

Fri 8/224:20 pmBWI - SEA

1 stop9h 39mUnited Airlines

Fri 8/2911:54 pmSEA - BWI

1 stop7h 01mUnited Airlines

Deal found 7/25

$257

Mon 9/15:38 pmBWI - SEA

1 stop8h 15mAmerican Airlines

Tue 9/1611:38 pmSEA - BWI

1 stop7h 35mAmerican Airlines

Deal found 7/25

$262

Tue 9/97:00 amBWI - SEA

Nonstop5h 40mAlaska Airlines

Tue 9/169:29 pmSEA - BWI

Nonstop5h 10mAlaska Airlines

Deal found 7/26

$263

Tue 9/97:15 amBWI - SEA

1 stop10h 28mDelta

Tue 9/1611:40 pmSEA - BWI

1 stop7h 56mDelta

Deal found 7/25

$269

Fri 8/15:26 pmBWI - SEA

1 stop10h 08mMultiple Airlines

Wed 8/65:30 pmSEA - BWI

2 stops21h 02mMultiple Airlines

Deal found 7/26

$273

Sat 8/95:26 pmBWI - SEA

1 stop9h 16mFrontier

Sun 8/246:17 amSEA - BWI

1 stop8h 40mFrontier

Deal found 7/26

$278

Mon 8/186:45 pmBWI - SEA

Nonstop5h 45mSouthwest

Tue 8/264:10 pmSEA - BWI

1 stop10h 00mSouthwest

Deal found 7/27

$287

Fri 10/2412:33 pmBWI - SEA

1 stop7h 28mSun Country Air

Sun 10/266:16 pmSEA - BWI

1 stop14h 04mSun Country Air

Deal found 7/27

$289

Last-minute flights from Baltimore to Seattle
Discover last-minute flight deals from Baltimore to Seattle. Data last updated July 28, 2025 and is based on user searches.

Fri 8/15:26 pmBWI - SEA

1 stop10h 08mMultiple Airlines

Wed 8/65:30 pmSEA - BWI

2 stops21h 02mMultiple Airlines

Deal found 7/26

$273

Sun 8/37:53 pmBWI - SEA

1 stop15h 41mMultiple Airlines

Wed 8/65:30 pmSEA - BWI

2 stops21h 02mMultiple Airlines

Deal found 7/28

$292

Wed 8/66:30 amBWI - SEA

2 stops12h 55mSpirit Airlines

Tue 8/125:30 pmSEA - BWI

1 stop9h 35mSpirit Airlines

Deal found 7/28

$391

Thu 8/78:06 pmBWI - SEA

1 stop15h 28mFrontier

Fri 8/156:25 amSEA - BWI

1 stop7h 06mFrontier

Deal found 7/27

$298

Sat 8/165:26 pmBWI - SEA

1 stop28h 20mFrontier

Sat 8/3012:40 pmSEA - BWI

1 stop26h 17mFrontier

Deal found 7/28

$259

Mon 8/187:10 pmBWI - SEA

Nonstop5h 57mHawaiian Airlines

Tue 8/2611:23 amSEA - BWI

1 stop9h 33mHawaiian Airlines

Deal found 7/27

$251

Mon 8/186:00 amBWI - SEA

1 stop8h 17mAmerican Airlines

Mon 8/256:34 amSEA - BWI

1 stop8h 29mAmerican Airlines

Deal found 7/26

$282

Mon 8/186:45 pmBWI - SEA

Nonstop5h 45mSouthwest

Tue 8/264:10 pmSEA - BWI

1 stop10h 00mSouthwest

Deal found 7/27

$287

Fri 8/224:20 pmBWI - SEA

1 stop9h 39mUnited Airlines

Fri 8/2911:54 pmSEA - BWI

1 stop7h 01mUnited Airlines

Deal found 7/25

$257

Sat 8/237:22 pmBWI - SEA

Nonstop5h 43mAlaska Airlines

Wed 8/279:29 pmSEA - BWI

Nonstop5h 04mAlaska Airlines

Deal found 7/28

$277

Sun 8/316:15 amBWI - SEA

1 stop9h 10mDelta

Thu 9/412:05 pmSEA - BWI

1 stop8h 42mDelta

Deal found 7/27

$283

One-way flights from Baltimore to Seattle
Search for one-way flight options from Baltimore to Seattle. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Thu 8/216:29 pmBWI - SEA

1 stop9h 05mFrontier

Deal found 7/27

$147

Sat 8/234:35 pmBWI - SEA

1 stop8h 55mSouthwest

Deal found 7/26

$148

Sat 8/2312:30 pmBWI - SEA

1 stop22h 28mSun Country Air

Deal found 7/25

$153

Tue 8/266:15 amBWI - SEA

2 stops12h 37mUnited Airlines

Deal found 7/26

$154

Tue 8/56:30 amBWI - SEA

2 stops12h 55mSpirit Airlines

Deal found 7/26

$158

Fri 10/246:12 pmBWI - SEA

Nonstop5h 48mHawaiian Airlines

Deal found 7/27

$159

Wed 8/206:20 pmBWI - SEA

1 stop8h 21mAmerican Airlines

Deal found 7/27

$169

Sat 9/136:45 amBWI - SEA

3 stops31h 15mMultiple Airlines

Deal found 7/27

$170

Sat 8/304:39 pmBWI - SEA

1 stop10h 20mDelta

Deal found 7/27

$180

Thu 8/287:00 amBWI - SEA

Nonstop5h 40mAlaska Airlines

Deal found 7/28

$229

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 8/18

7:10 pm-10:07 pm

Nonstop5h 57m

Seattle/Tacoma Intl

Tue 8/26

11:23 am-11:56 pm

1 stop9h 33m

$251

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 8/22

4:20 pm-10:59 pm

1 stop9h 39m

Seattle/Tacoma Intl

Fri 8/29

11:54 pm-9:55 am

1 stop7h 01m

$257

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 9/1

5:38 pm-10:53 pm

1 stop8h 15m

Seattle/Tacoma Intl

Tue 9/16

11:38 pm-10:13 am

1 stop7h 35m

$262

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 9/9

7:00 am-9:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

Tue 9/16

9:29 pm-5:39 am

Nonstop5h 10m

$263

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 9/9

7:15 am-2:43 pm

1 stop10h 28m

Seattle/Tacoma Intl

Tue 9/16

11:40 pm-10:36 am

1 stop7h 56m

$269

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 8/1

5:26 pm-12:34 am

1 stop10h 08m

Seattle/Tacoma Intl

Wed 8/6

5:30 pm-5:32 pm

2 stops21h 02m

$273

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 8/9

5:26 pm-11:42 pm

1 stop9h 16m

Seattle/Tacoma Intl

Sun 8/24

6:17 am-5:57 pm

1 stop8h 40m

$278

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 8/18

6:45 pm-9:30 pm

Nonstop5h 45m

Seattle/Tacoma Intl

Tue 8/26

4:10 pm-5:10 am

1 stop10h 00m

$287

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 10/24

12:33 pm-5:01 pm

1 stop7h 28m

Seattle/Tacoma Intl

Sun 10/26

6:16 pm-11:20 am

1 stop14h 04m

$289

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 8/21

6:29 pm-12:34 am

1 stop9h 05m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 19 results

Best time to book a flight from Baltimore to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Baltimore 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 Baltimore to Seattle

How far ahead should I book a flight from Baltimore to Seattle?

The best time to book flights from Baltimore to Seattle is 24 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 Baltimore to Seattle?

Currently, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in June is currently the most expensive (average of $389). 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 BWI to SEA?

A simple way to save on the total cost of your ticket is to fly from Baltimore to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Baltimore to Seattle?

Travelers seeking maximum savings on their Baltimore to Seattle flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Baltimore to Seattle

The most flights from BWI to SEA are scheduled on a Saturday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).

What’s the top layover airport for flights from Baltimore to Seattle?

Denver (DEN) – chosen by Cheapflights users on 70% of 1-stop itineraries from Baltimore to Seattle on Cheapflights.

What’s the cheapest layover airport for flights from Baltimore to Seattle?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $227.

What’s the fastest layover option from Baltimore to Seattle?

Flights via Minneapolis (MSP) have the shortest average one-way travel time for 1-stop routes: 4h 50m.

Which airport typically offers the quickest layover for flights from Baltimore to Seattle?

Flights via Minneapolis (MSP) offer the fastest connection on this route, with an average layover time of 1h 54m.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Baltimore to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Southwest

8.0

Very good

4,237 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Delta

8.0

Very good

7,975 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Hawaiian Airlines

7.8

Good

2,604 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

United Airlines

7.4

Good

8,892 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Related info for your journey

What airports do I use to fly from Baltimore to Seattle?
To fly from Baltimore to Seattle, you need to book a flight from Baltimore/Washington (BWI) to Seattle/Tacoma Intl (SEA). Nonstop flights to Seattle/Tacoma Intl from Baltimore/Washington take 5h 40m on average. When it comes time to book airfare, you have a few options: there are 7 outbound flights from Baltimore/Washington to Seattle/Tacoma Intl offered by 9 different airlines.
How popular is this Baltimore to Seattle flight route?
The Baltimore/Washington to Seattle/Tacoma Intl flight path was viewed by 29 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines flying from Baltimore to Seattle round-trip?
According to our current data, Hawaiian Airlines ($251), United Airlines ($257), and American Airlines ($262) offers the cheapest pricing from Baltimore to Seattle. Hawaiian Airlines is 39% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Baltimore to Seattle one-way?
One-way options have recently been found by users for as low as $147 on Frontier. Other airlines that offer cheap prices include Southwest from $148 and Sun Country Air from $153 one-way.
What are the most reliable airlines from Baltimore to Seattle?
Consider Finnair (94%), Southwest (67%) or Alaska Airlines (63%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Seattle.
What are the cheapest flights from Baltimore to Seattle?
The cheapest flight price from Baltimore to Seattle is $138. On average you can expect to pay $1,257. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $207.
Where are the most common layover locations when flying from Baltimore to Seattle?
Most of the time, Baltimore to Seattle flights that have layovers will stop in Chicago.
What are some popular things to do or see while on a layover in Chicago?
Most Chicago visitors opt to spend their time experiencing Magnificent Mile, River North, and Grant Park. Magnificent Mile, River North, and Grant Park are located about 15.5 mi, 15.0 mi, and 16.2 mi, respectively from Chicago O'Hare Intl. Travelers can rent a car at Chicago O'Hare Intl for an average daily rate of $69 to make sightseeing during their layover a little easier.
Where are the least popular layover locations for Baltimore to Seattle flights?
Baltimore to Seattle flights have a layover in Minneapolis least often.
Can I find deals for flights from Baltimore to Seattle that include hotel bookings?
Yes. In addition to deals on Baltimore to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Baltimore to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Baltimore to Seattle.
Can I find deals for business class flights from Baltimore to Seattle?
Yes. Cheapflights offers flight deals from Baltimore 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 Baltimore to Seattle?
Currently, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in June is currently the most expensive (average of $389). 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.

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Other flights to Seattle

Top 9 airlines flying from Baltimore to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$103	Average$264	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$134	Average$222	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$206	Average$379	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$206	Average$327	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$260	Average$491	FlexibilityNo cancel fee	On-time63%
Hawaiian Airlines	Cheapest$261	Average$419	FlexibilityNo cancel fee	On-time85%
United Airlines	Cheapest$276	Average$418	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$277	Average$474	FlexibilityNo cancel fee	On-time75%
Sun Country Air	Cheapest$313	Average$402	FlexibilityNo cancel fee	On-time83%

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$147+ Cheap flights from Baltimore to Seattle (BWI - 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Baltimore 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 Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or September, booked 24 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from Baltimore to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Baltimore to Seattle

Cheapest flights from Baltimore to SeattleExplore the most affordable flight options available from Baltimore to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Explore the most affordable flight options available from Baltimore to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Baltimore to Seattle that are best for you.

Best time to book a flight from Baltimore to Seattle

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

Cheapflights Insights

Everything you need to know about your flight from Baltimore to Seattle

How far ahead should I book a flight from Baltimore to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to Seattle. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from Baltimore to Seattle?

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

Find hourly flight availability from Baltimore 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 July 28, 2025.

What is the cheapest day to fly from Baltimore to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Baltimore to Seattle. Price data was last updated on July 27, 2025.

Weekly flight availability from Baltimore to Seattle

Explore weekly flight availability from Baltimore to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

What’s the top layover airport for flights from Baltimore to Seattle?

Share of 1-stop round-trip flights from Baltimore to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from Baltimore to Seattle?

Average round-trip fare for 1-stop flights from Baltimore to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from Baltimore to Seattle?

Shortest average travel time for 1-stop one-way flights from Baltimore to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from Baltimore to Seattle?

Average layover duration for 1-stop one-way flights from Baltimore to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Baltimore to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airports do I use to fly from Baltimore to Seattle?

How popular is this Baltimore to Seattle flight route?

What are the cheapest airlines flying from Baltimore to Seattle round-trip?

What are the cheapest airlines to fly from Baltimore to Seattle one-way?

What are the most reliable airlines from Baltimore to Seattle?

What are the cheapest flights from Baltimore to Seattle?

Where are the most common layover locations when flying from Baltimore to Seattle?

What are some popular things to do or see while on a layover in Chicago?

Where are the least popular layover locations for Baltimore to Seattle flights?

Can I find deals for flights from Baltimore to Seattle that include hotel bookings?

How can I find direct flights from Baltimore to Seattle?

Can I find deals for business class flights from Baltimore to Seattle?

What is the cheapest month to book a flight from Baltimore to Seattle?

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Alternative routes for Baltimore to Seattle

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Top 9 airlines flying from Baltimore to Seattle

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Cheapest flights from Baltimore to Seattle
Explore the most affordable flight options available from Baltimore to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.