$84+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Aug 20 — Aug 271
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 July 21, 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 July 21, 2026.
This Delta deal was found by Cheapflights users on 7/20. 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.
Sun 10/184:39 pm
BWI
- SEA
1 stop10h 13m
Delta
Sun 10/2511:05 pm
SEA
- BWI
1 stop6h 34m
Delta
Deal found 7/20![Delta logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/227:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Wed 8/2610:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/267:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Tue 9/16:51 pm
SEA
- BWI
1 stop17h 49m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 7/18. 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 8/2110:25 am
BWI
- SEA
1 stop8h 35m
Delta
Thu 9/106:00 am
SEA
- BWI
1 stop8h 26m
Delta
Deal found 7/18![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/284:18 pm
BWI
- SEA
1 stop9h 46m
United Airlines
Sat 9/55:20 pm
SEA
- BWI
2 stops13h 49m
United Airlines
Deal found 7/16![United Airlines logo]()
$382
This Southwest deal was found by Cheapflights users on 7/20. 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.
Wed 8/1212:10 pm
BWI
- SEA
2 stops9h 00m
Southwest
Thu 8/2011:00 pm
SEA
- BWI
2 stops12h 35m
Southwest
Deal found 7/20![Southwest logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/2412:25 pm
BWI
- SEA
1 stop7h 28m
Multiple Airlines
Fri 9/117:00 am
SEA
- BWI
2 stops22h 29m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/224:43 pm
BWI
- SEA
1 stop8h 56m
Alaska Airlines
Tue 8/2510:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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 8/197:50 am
BWI
- SEA
Nonstop5h 39m
Alaska Airlines
Mon 8/319:59 pm
SEA
- BWI
1 stop14h 41m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 7/21. 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.
Sat 8/225:36 pm
BWI
- SEA
1 stop7h 29m
Delta
Fri 9/46:05 am
SEA
- BWI
1 stop9h 17m
Delta
Deal found 7/21![Delta logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/2412:25 pm
BWI
- SEA
1 stop7h 28m
Multiple Airlines
Thu 9/107:00 am
SEA
- BWI
2 stops22h 29m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$390
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 July 21, 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 July 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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 9/97:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Sun 9/139:59 pm
SEA
- BWI
1 stop14h 41m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$407
This United Airlines deal was found by Cheapflights users on 7/19. 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 9/185:35 pm
BWI
- SEA
1 stop8h 10m
United Airlines
Sun 9/2011:00 pm
SEA
- BWI
1 stop8h 39m
United Airlines
Deal found 7/19![United Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 7/18. 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 9/84:30 pm
BWI
- SEA
2 stops10h 05m
Southwest
Sat 9/192:20 pm
SEA
- BWI
2 stops13h 10m
Southwest
Deal found 7/18![Southwest logo]()
$437
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 9/164:43 pm
BWI
- SEA
1 stop8h 56m
Alaska Airlines
Mon 9/2110:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$408
This Southwest deal was found by Cheapflights users on 7/20. 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 8/1110:30 am
BWI
- SEA
2 stops12h 45m
Southwest
Mon 10/125:10 pm
SEA
- BWI
1 stop9h 35m
Southwest
Deal found 7/20![Southwest logo]()
$442
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 9/57:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Mon 9/1410:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 9/107:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Mon 9/148:59 pm
SEA
- BWI
1 stop15h 41m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$418
This Southwest deal was found by Cheapflights users on 7/17. 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 8/171:45 pm
BWI
- SEA
2 stops10h 00m
Southwest
Mon 8/246:15 am
SEA
- BWI
2 stops11h 00m
Southwest
Deal found 7/17![Southwest logo]()
$467
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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 8/224:43 pm
BWI
- SEA
1 stop8h 56m
Alaska Airlines
Sun 8/308:59 pm
SEA
- BWI
1 stop15h 41m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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.
Fri 10/166:12 pm
BWI
- SEA
Nonstop5h 47m
Alaska Airlines
Mon 10/199:15 pm
SEA
- BWI
Nonstop5h 05m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$437
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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.
Sun 8/166:07 pm
BWI
- SEA
Nonstop5h 53m
Alaska Airlines
Mon 8/2410:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$484
Last-minute flights from Baltimore to SeattleDiscover last-minute flight deals from Baltimore to Seattle. Data last updated July 21, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Seattle. Data last updated July 21, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/20. 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 8/101:45 pm
BWI
- SEA
2 stops10h 00m
Southwest
Thu 8/2011:00 pm
SEA
- BWI
2 stops12h 35m
Southwest
Deal found 7/20![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 7/20. 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.
Wed 8/1212:10 pm
BWI
- SEA
2 stops9h 00m
Southwest
Thu 8/2011:00 pm
SEA
- BWI
2 stops12h 35m
Southwest
Deal found 7/20![Southwest logo]()
$383
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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 8/197:50 am
BWI
- SEA
Nonstop5h 39m
Alaska Airlines
Mon 8/319:59 pm
SEA
- BWI
1 stop14h 41m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 7/18. 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 8/2110:25 am
BWI
- SEA
1 stop8h 35m
Delta
Thu 9/106:00 am
SEA
- BWI
1 stop8h 26m
Delta
Deal found 7/18![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/227:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Wed 8/2610:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/224:43 pm
BWI
- SEA
1 stop8h 56m
Alaska Airlines
Tue 8/2510:23 pm
SEA
- BWI
Nonstop5h 07m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$387
This Delta deal was found by Cheapflights users on 7/21. 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.
Sat 8/225:36 pm
BWI
- SEA
1 stop7h 29m
Delta
Fri 9/46:05 am
SEA
- BWI
1 stop9h 17m
Delta
Deal found 7/21![Delta logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/2412:25 pm
BWI
- SEA
1 stop7h 28m
Multiple Airlines
Fri 9/117:00 am
SEA
- BWI
2 stops22h 29m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/2412:25 pm
BWI
- SEA
1 stop7h 28m
Multiple Airlines
Thu 9/107:00 am
SEA
- BWI
2 stops22h 29m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$390
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/267:15 pm
BWI
- SEA
Nonstop5h 42m
Alaska Airlines
Tue 9/16:51 pm
SEA
- BWI
1 stop17h 49m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/284:18 pm
BWI
- SEA
1 stop9h 46m
United Airlines
Sat 9/55:20 pm
SEA
- BWI
2 stops13h 49m
United Airlines
Deal found 7/16![United Airlines logo]()
$382
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 July 21, 2026.
Search for one-way flight options from Baltimore to Seattle. Find affordable one-way fares based on user searches. Data last updated July 21, 2026.
This Southwest deal was found by Cheapflights users on 7/18. 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.
Wed 9/3010:20 am
BWI
- SEA
Nonstop5h 40m
Southwest
Deal found 7/18![Southwest logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 8/318:45 am
BWI
- SEA
2 stops27h 34m
Frontier
Deal found 7/19![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/216:45 am
BWI
- SEA
2 stops29h 34m
Frontier
Deal found 7/18![Frontier logo]()
$93
This Southwest deal was found by Cheapflights users on 7/16. 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 8/316:35 am
BWI
- SEA
1 stop7h 10m
Southwest
Deal found 7/16![Southwest logo]()
$94
This Southwest deal was found by Cheapflights users on 7/16. 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 10/1511:40 am
BWI
- SEA
1 stop14h 00m
Southwest
Deal found 7/16![Southwest logo]()
$99
This Expedia deal was found by Cheapflights users on 7/17. 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.
Sat 8/2211:03 am
BWI
- SEA
1 stop11h 02m
Delta
Deal found 7/17![Delta logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 8/149:32 pm
BWI
- SEA
2 stops18h 45m
Frontier
Deal found 7/17![Frontier logo]()
$103
This Delta deal was found by Cheapflights users on 7/16. 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 10/166:10 pm
BWI
- SEA
1 stop8h 42m
Delta
Deal found 7/16![Delta logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 7/16. 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.
Sat 9/129:20 pm
BWI
- SEA
2 stops39h 31m
Frontier
Deal found 7/16![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 9/139:20 pm
BWI
- SEA
2 stops30h 07m
Frontier
Deal found 7/18![Frontier logo]()
$108
This Southwest deal was found by Cheapflights users on 7/18. 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 8/219:30 am
BWI
- SEA
1 stop12h 15m
Southwest
Deal found 7/18![Southwest logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sat 8/229:37 pm
BWI
- SEA
2 stops38h 42m
Frontier
Deal found 7/18![Frontier logo]()
$111
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 July 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $373 (Delta) |
One-way from | $84 (Southwest) |
Popular in | June |
Cheapest in | February |
Average price | $520 |
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 2,558,603 searches. Data last updated July 21, 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 - SEA
BWISEA
Baltimore/Washington
Wed 9/9
7:15 pm-9:57 pm
Nonstop5h 42m
Seattle/Tacoma Intl
Sun 9/13
9:59 pm-3:40 pm
1 stop14h 41m
$407
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Wed 9/16
4:43 pm-10:39 pm
1 stop8h 56m
Seattle/Tacoma Intl
Mon 9/21
10:23 pm-6:30 am
Nonstop5h 07m
$408
Quickest round-trip
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Sat 9/5
7:15 pm-9:57 pm
Nonstop5h 42m
Seattle/Tacoma Intl
Mon 9/14
10:23 pm-6:30 am
Nonstop5h 07m
$412
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Thu 9/10
7:15 pm-9:57 pm
Nonstop5h 42m
Seattle/Tacoma Intl
Mon 9/14
8:59 pm-3:40 pm
1 stop15h 41m
$418
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Sat 8/22
4:43 pm-10:39 pm
1 stop8h 56m
Seattle/Tacoma Intl
Sun 8/30
8:59 pm-3:40 pm
1 stop15h 41m
$427
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Fri 9/18
5:35 pm-10:45 pm
1 stop8h 10m
Seattle/Tacoma Intl
Sun 9/20
11:00 pm-10:39 am
1 stop8h 39m
$437
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Tue 9/8
4:30 pm-11:35 pm
2 stops10h 05m
Seattle/Tacoma Intl
Sat 9/19
2:20 pm-6:30 am
2 stops13h 10m
$437
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Fri 10/16
6:12 pm-8:59 pm
Nonstop5h 47m
Seattle/Tacoma Intl
Mon 10/19
9:15 pm-5:20 am
Nonstop5h 05m
$437
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Tue 8/11
10:30 am-8:15 pm
2 stops12h 45m
Seattle/Tacoma Intl
Mon 10/12
5:10 pm-5:45 am
1 stop9h 35m
$442
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Mon 8/17
1:45 pm-8:45 pm
2 stops10h 00m
Seattle/Tacoma Intl
Mon 8/24
6:15 am-8:15 pm
2 stops11h 00m
$467
Showing 1-10 of 22 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 July.
| 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*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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
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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 $298). 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 July 21, 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 35% 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 50% 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.
Detroit (DTW) is the most affordable 1-stop option, with an average round-trip price of $219.
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
Our travel experts
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 July 21, 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.
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentTim,Jul 2024
DEN - SEA
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
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
Tacoma
Renton
Lacey
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Issaquah
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Search flights from Baltimore to Seattle by cabin class
Find flights from Baltimore to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Baltimore and Seattle flights
Browse other Baltimore and Seattle flight options. Last updated on July 21, 2026.
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Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 21, 2026.
Top 9 airlines flying from Baltimore to Seattle
Discover the top 9 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 2,558,603 searches. Data last updated July 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$299 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$377 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$168 | Average$286 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$179 | Average$366 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$219 | Average$369 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$228 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$234 | Average$472 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$261 | Average$456 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$295 | Average$465 | FlexibilityNo cancel fee | On-time83% |