$121+ Cheap flights from Baltimore to Seattle (BWI - SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Oct 4 — Oct 111
Round-trip
1 adult, Economy
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Find cheap flights from Baltimore to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in February or January, booked 74 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday
Cheap flight deals from Baltimore to Seattle
Cheapest
Best
Last-minute
One-way
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 September 4, 2026.
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 September 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 am -
Nonstop5h 39m
Tue 9/2912:30 pm -
1 stop24h 10m
Deal found 9/1![Alaska Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:43 pm -
1 stop29h 08m
Wed 9/3010:23 pm -
Nonstop5h 07m
Deal found 9/1![Alaska Airlines logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:43 pm -
1 stop29h 08m
Sun 9/2710:23 pm -
Nonstop5h 07m
Deal found 9/1![Alaska Airlines logo]()
$360
This SmartFares deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:15 pm -
Nonstop5h 45m
Wed 10/219:18 pm -
Nonstop5h 02m
Deal found 8/31![Alaska Airlines logo]()
$374
This lol.travel deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:02 am -
Nonstop5h 44m
Sat 10/319:03 am -
Nonstop5h 09m
Deal found 9/1![Alaska Airlines logo]()
$382
This Expedia deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:02 am -
Nonstop5h 54m
Thu 11/129:41 pm -
Nonstop4h 59m
Deal found 9/3![Alaska Airlines logo]()
$395
This Alaska Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/156:11 pm -
Nonstop5h 51m
Tue 1/59:20 am -
Nonstop4h 57m
Deal found 9/3![Alaska Airlines logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:15 pm -
Nonstop5h 45m
Thu 10/159:18 pm -
Nonstop5h 02m
Deal found 9/2![Alaska Airlines logo]()
$407
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:15 pm -
Nonstop5h 42m
Tue 10/69:18 pm -
Nonstop5h 02m
Deal found 9/1![Alaska Airlines logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/612:12 pm -
1 stop8h 10m
Wed 11/114:27 pm -
2 stops15h 25m
Deal found 9/4![Multiple Airlines logo]()
$409
Best flights from Baltimore to SeattleDiscover 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 September 4, 2026.
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 September 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:15 pm -
Nonstop5h 42m
Mon 9/2810:23 pm -
Nonstop5h 07m
Deal found 9/1![Alaska Airlines logo]()
$417
This Delta deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:10 am -
1 stop7h 16m
Fri 10/27:59 pm -
1 stop7h 19m
Deal found 8/30![Delta logo]()
$417
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:34 pm -
2 stops11h 45m
Sat 10/3110:50 am -
1 stop7h 52m
Deal found 9/3![United Airlines logo]()
$418
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1011:55 am -
1 stop12h 15m
Sat 11/145:30 am -
2 stops11h 05m
Deal found 8/31![Southwest logo]()
$422
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:19 pm -
1 stop8h 00m
Mon 11/95:05 am -
2 stops11h 04m
Deal found 8/31![United Airlines logo]()
$422
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:25 pm -
2 stops10h 10m
Wed 10/76:15 am -
2 stops9h 10m
Deal found 8/31![Southwest logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:43 pm -
1 stop8h 56m
Fri 9/256:51 pm -
1 stop17h 49m
Deal found 8/31![Alaska Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:55 pm -
1 stop8h 45m
Mon 10/266:50 pm -
1 stop7h 50m
Deal found 9/3![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:00 pm -
2 stops12h 00m
Sat 9/2611:05 pm -
1 stop7h 50m
Deal found 9/3![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:40 am -
1 stop9h 10m
Fri 10/28:40 pm -
2 stops10h 00m
Deal found 9/3![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:20 pm -
1 stop9h 35m
Tue 9/296:40 am -
2 stops9h 20m
Deal found 8/31![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:35 am -
2 stops12h 55m
Sat 10/1012:10 am -
2 stops9h 45m
Deal found 9/4![Southwest logo]()
$447
Last-minute flights from Baltimore to SeattleDiscover last-minute flight deals from Baltimore to Seattle. Data last updated September 4, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Seattle. Data last updated September 4, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:43 pm -
1 stop29h 08m
Sun 9/2710:23 pm -
Nonstop5h 07m
Deal found 9/1![Alaska Airlines logo]()
$360
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 am -
Nonstop5h 39m
Tue 9/2912:30 pm -
1 stop24h 10m
Deal found 9/1![Alaska Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:43 pm -
1 stop29h 08m
Wed 9/3010:23 pm -
Nonstop5h 07m
Deal found 9/1![Alaska Airlines logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:15 pm -
Nonstop5h 42m
Tue 10/69:18 pm -
Nonstop5h 02m
Deal found 9/1![Alaska Airlines logo]()
$408
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:02 am -
Nonstop5h 44m
Wed 10/289:18 pm -
Nonstop5h 02m
Deal found 9/4![Alaska Airlines logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:15 pm -
Nonstop5h 45m
Mon 10/199:18 pm -
Nonstop5h 02m
Deal found 9/2![Alaska Airlines logo]()
$407
This SmartFares deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:15 pm -
Nonstop5h 45m
Wed 10/219:18 pm -
Nonstop5h 02m
Deal found 8/31![Alaska Airlines logo]()
$374
This lol.travel deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:02 am -
Nonstop5h 44m
Sat 10/319:03 am -
Nonstop5h 09m
Deal found 9/1![Alaska Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:13 pm -
1 stop8h 02m
Wed 10/2810:50 am -
1 stop7h 52m
Deal found 9/1![United Airlines logo]()
$412
One-way flights from Baltimore to SeattleSearch for one-way flight options from Baltimore to Seattle. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
Search for one-way flight options from Baltimore to Seattle. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:22 pm -
2 stops23h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$121
This Trip.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:12 pm -
2 stops21h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:25 pm -
2 stops23h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/169:12 pm -
2 stops21h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:40 am -
2 stops16h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:40 am -
2 stops16h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:59 pm -
2 stops21h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:59 pm -
2 stops28h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:42 pm -
2 stops28h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:42 pm -
2 stops27h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:32 pm -
2 stops48h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$168
Find flight deals from Baltimore to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $321 (Alaska Airlines) |
One-way from | $121 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $385 |
Cheapflights Fare Finder
Customize your flight search to find flights from Baltimore to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 4, 2026.
Use the filters below to find and compare flights from Baltimore to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Sat 10/31
7:02 am-9:46 am
Nonstop5h 44m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Tue 9/29
10:20 am-1:00 pm
Nonstop5h 40m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Tue 11/10
6:30 pm-11:57 pm
1 stop8h 27m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
Quickest round-trip
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Sun 9/27
7:50 am-10:29 am
Nonstop5h 39m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Wed 9/30
7:15 pm-11:55 pm
1 stop7h 40m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Thu 10/1
7:40 am-2:50 pm
1 stop10h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Tue 9/22
7:15 pm-9:57 pm
Nonstop5h 42m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Thu 10/1
5:25 pm-12:35 am
2 stops10h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$214
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Sat 10/3
2:20 pm-9:40 pm
2 stops10h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$214
BaltimoreSeattle
BWI Baltimore/Washington - SEA Seattle/Tacoma Intl
BWISEA
Baltimore/Washington
Sun 11/1
6:20 am-3:05 pm
2 stops11h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$214
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Baltimore to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Baltimore to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Baltimore-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Baltimore-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Baltimore-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Baltimore-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
BWI-SEA
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
Prices
More
How far ahead should I book a flight from Baltimore to Seattle?
The best time to book flights from Baltimore to Seattle is 73 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, February is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $297). Flying from Baltimore to Seattle in June is currently the most expensive (average of $534). 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?
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 September 4, 2026.
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 38% on your trip compared to booking a flight at noon.
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.
Detroit (DTW) – chosen by Cheapflights users on 75% of 1-stop itineraries from Baltimore to Seattle on Cheapflights.
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.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $170.
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.
Flights via Detroit (DTW) have the shortest average one-way travel time for 1-stop routes: 7h 24m.
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.
Flights via Detroit (DTW) offer the fastest connection on this route, with an average layover time of 0h 43m.
The best insider tips for Baltimore to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Baltimore to Seattle trip
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Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated September 4, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta 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.
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
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Baltimore and Seattle flights
Browse other Baltimore and Seattle flight options. Last updated on September 4, 2026.
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Top 7 airlines flying from Baltimore to Seattle
Discover the top 7 airlines that operate flights from Baltimore to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$292 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$158 | Average$342 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$179 | Average$378 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$196 | Average$470 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$219 | Average$369 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$228 | Average$405 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$276 | Average$461 | FlexibilityNo cancel fee | On-time75% |