$95+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Apr 9 — Apr 161
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 84 days in advance, depart on a Tuesday or Thursday 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 March 10, 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 March 10, 2026.
This American Airlines deal was found by Cheapflights users on 3/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:52 pm
BWI
- SEA
1 stop7h 44m
American Airlines
Tue 4/1410:29 pm
SEA
- BWI
1 stop7h 27m
American Airlines
Deal found 3/5![American Airlines logo]()
$199
This Southwest deal was found by Cheapflights users on 3/5. 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.
Sun 4/55:50 pm
BWI
- SEA
2 stops10h 50m
Southwest
Tue 4/145:35 pm
SEA
- BWI
1 stop9h 10m
Southwest
Deal found 3/5![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 3/5. 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 5/13:05 pm
BWI
- SEA
2 stops12h 50m
Southwest
Mon 5/119:40 am
SEA
- BWI
2 stops10h 50m
Southwest
Deal found 3/5![Southwest logo]()
$209
This Southwest deal was found by Cheapflights users on 3/9. 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 5/14:45 pm
BWI
- SEA
2 stops11h 10m
Southwest
Sun 5/108:50 pm
SEA
- BWI
1 stop12h 30m
Southwest
Deal found 3/9![Southwest logo]()
$210
This Southwest deal was found by Cheapflights users on 3/5. 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 4/218:50 am
BWI
- SEA
2 stops15h 10m
Southwest
Tue 4/286:30 am
SEA
- BWI
2 stops10h 20m
Southwest
Deal found 3/5![Southwest logo]()
$215
This Delta deal was found by Cheapflights users on 3/5. 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 4/35:40 am
BWI
- SEA
1 stop7h 53m
Delta
Tue 4/287:35 pm
SEA
- BWI
1 stop7h 25m
Delta
Deal found 3/5![Delta logo]()
$217
This American Airlines deal was found by Cheapflights users on 3/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:00 am
BWI
- SEA
1 stop9h 15m
American Airlines
Tue 4/281:19 pm
SEA
- BWI
1 stop7h 37m
American Airlines
Deal found 3/5![American Airlines logo]()
$218
This Delta deal was found by Cheapflights users on 3/9. 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.
Mon 4/65:40 am
BWI
- SEA
1 stop7h 53m
Delta
Tue 4/147:35 pm
SEA
- BWI
1 stop7h 25m
Delta
Deal found 3/9![Delta logo]()
$219
This Southwest deal was found by Cheapflights users on 3/9. 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 5/66:20 pm
BWI
- SEA
1 stop8h 50m
Southwest
Sat 5/911:15 am
SEA
- BWI
1 stop15h 15m
Southwest
Deal found 3/9![Southwest logo]()
$224
This Delta deal was found by Cheapflights users on 3/6. 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.
Thu 4/95:40 am
BWI
- SEA
1 stop7h 53m
Delta
Tue 4/1411:14 pm
SEA
- BWI
1 stop6h 57m
Delta
Deal found 3/6![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 3/9. 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 6/28:50 am
BWI
- SEA
2 stops14h 30m
Southwest
Tue 6/211:45 pm
SEA
- BWI
1 stop7h 05m
Southwest
Deal found 3/9![Southwest logo]()
$230
This Southwest deal was found by Cheapflights users on 3/9. 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 4/225:05 pm
BWI
- SEA
1 stop8h 25m
Southwest
Wed 4/296:30 am
SEA
- BWI
2 stops8h 10m
Southwest
Deal found 3/9![Southwest logo]()
$234
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 March 10, 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 March 10, 2026.
This Southwest deal was found by Cheapflights users on 3/9. 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 6/33:25 pm
BWI
- SEA
1 stop11h 30m
Southwest
Thu 6/119:25 pm
SEA
- BWI
Nonstop4h 55m
Southwest
Deal found 3/9![Southwest logo]()
$288
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/267:04 am
BWI
- SEA
Nonstop5h 47m
Alaska Airlines
Mon 5/49:32 pm
SEA
- BWI
Nonstop5h 12m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Sun 5/247:11 pm
BWI
- SEA
1 stop7h 48m
United Airlines
Mon 6/810:40 pm
SEA
- BWI
1 stop7h 37m
United Airlines
Deal found 3/6![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 3/9. 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 6/45:00 pm
BWI
- SEA
2 stops9h 05m
Southwest
Mon 6/811:05 pm
SEA
- BWI
1 stop6h 45m
Southwest
Deal found 3/9![Southwest logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 3/6. 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 6/14:17 pm
BWI
- SEA
1 stop9h 17m
Alaska Airlines
Tue 6/910:20 pm
SEA
- BWI
Nonstop5h 08m
Alaska Airlines
Deal found 3/6![Alaska Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 3/5. 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 4/96:45 am
BWI
- SEA
1 stop13h 35m
Southwest
Mon 4/1311:55 pm
SEA
- BWI
2 stops8h 55m
Southwest
Deal found 3/5![Southwest logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 3/6. 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 5/267:35 pm
BWI
- SEA
Nonstop5h 51m
Alaska Airlines
Wed 6/109:35 pm
SEA
- BWI
Nonstop5h 08m
Alaska Airlines
Deal found 3/6![Alaska Airlines logo]()
$328
This Southwest deal was found by Cheapflights users on 3/9. 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.
Sat 4/253:50 pm
BWI
- SEA
1 stop9h 20m
Southwest
Sun 4/262:20 pm
SEA
- BWI
1 stop7h 15m
Southwest
Deal found 3/9![Southwest logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 4/77:04 pm
BWI
- SEA
Nonstop5h 54m
Alaska Airlines
Mon 4/1312:35 am
SEA
- BWI
1 stop7h 36m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 3/9. 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 4/243:05 pm
BWI
- SEA
2 stops12h 50m
Southwest
Sun 4/262:20 pm
SEA
- BWI
1 stop7h 15m
Southwest
Deal found 3/9![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 3/6. 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 3/186:10 am
BWI
- SEA
1 stop9h 55m
Southwest
Mon 4/1311:55 pm
SEA
- BWI
1 stop6h 55m
Southwest
Deal found 3/6![Southwest logo]()
$358
Last-minute flights from Baltimore to SeattleDiscover last-minute flight deals from Baltimore to Seattle. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Seattle. Data last updated March 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/5. 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 4/35:40 am
BWI
- SEA
1 stop7h 53m
Delta
Tue 4/287:35 pm
SEA
- BWI
1 stop7h 25m
Delta
Deal found 3/5![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 3/5. 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.
Sun 4/55:50 pm
BWI
- SEA
2 stops10h 50m
Southwest
Tue 4/145:35 pm
SEA
- BWI
1 stop9h 10m
Southwest
Deal found 3/5![Southwest logo]()
$204
This Delta deal was found by Cheapflights users on 3/9. 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.
Mon 4/65:40 am
BWI
- SEA
1 stop7h 53m
Delta
Mon 4/137:35 pm
SEA
- BWI
1 stop7h 25m
Delta
Deal found 3/9![Delta logo]()
$219
This American Airlines deal was found by Cheapflights users on 3/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:52 pm
BWI
- SEA
1 stop7h 44m
American Airlines
Tue 4/1410:29 pm
SEA
- BWI
1 stop7h 27m
American Airlines
Deal found 3/5![American Airlines logo]()
$199
This Delta deal was found by Cheapflights users on 3/6. 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.
Thu 4/95:40 am
BWI
- SEA
1 stop7h 53m
Delta
Tue 4/1411:14 pm
SEA
- BWI
1 stop6h 57m
Delta
Deal found 3/6![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 3/6. 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 4/169:40 am
BWI
- SEA
1 stop15h 55m
Southwest
Sat 4/189:00 am
SEA
- BWI
2 stops8h 40m
Southwest
Deal found 3/6![Southwest logo]()
$240
This American Airlines deal was found by Cheapflights users on 3/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/206:31 pm
BWI
- SEA
1 stop9h 05m
American Airlines
Fri 4/2411:33 pm
SEA
- BWI
1 stop8h 38m
American Airlines
Deal found 3/6![American Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 3/5. 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 4/218:50 am
BWI
- SEA
2 stops15h 10m
Southwest
Tue 4/286:30 am
SEA
- BWI
2 stops10h 20m
Southwest
Deal found 3/5![Southwest logo]()
$215
This American Airlines deal was found by Cheapflights users on 3/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:00 am
BWI
- SEA
1 stop9h 15m
American Airlines
Tue 4/281:19 pm
SEA
- BWI
1 stop7h 37m
American Airlines
Deal found 3/5![American Airlines logo]()
$218
This Southwest deal was found by Cheapflights users on 3/9. 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 4/225:05 pm
BWI
- SEA
1 stop8h 25m
Southwest
Wed 4/296:30 am
SEA
- BWI
2 stops8h 10m
Southwest
Deal found 3/9![Southwest logo]()
$234
This Southwest deal was found by Cheapflights users on 3/9. 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.
Sat 4/2511:10 am
BWI
- SEA
2 stops10h 05m
Southwest
Mon 4/2711:55 pm
SEA
- BWI
1 stop6h 55m
Southwest
Deal found 3/9![Southwest logo]()
$224
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 March 10, 2026.
Search for one-way flight options from Baltimore to Seattle. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/2112:17 pm
BWI
- SEA
2 stops24h 10m
Frontier
Deal found 3/5![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/1412:17 pm
BWI
- SEA
2 stops24h 10m
Frontier
Deal found 3/5![Frontier logo]()
$97
This Delta deal was found by Cheapflights users on 3/9. 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.
Tue 4/77:01 am
BWI
- SEA
1 stop10h 53m
Delta
Deal found 3/9![Delta logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/212:20 pm
BWI
- SEA
2 stops24h 07m
Frontier
Deal found 3/5![Frontier logo]()
$101
This Southwest deal was found by Cheapflights users on 3/9. 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 5/84:45 pm
BWI
- SEA
2 stops11h 10m
Southwest
Deal found 3/9![Southwest logo]()
$105
This Delta deal was found by Cheapflights users on 3/10. 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.
Mon 4/65:40 am
BWI
- SEA
1 stop7h 53m
Delta
Deal found 3/10![Delta logo]()
$110
This Southwest deal was found by Cheapflights users on 3/9. 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 6/28:50 am
BWI
- SEA
2 stops15h 10m
Southwest
Deal found 3/9![Southwest logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/76:05 am
BWI
- SEA
2 stops14h 37m
Frontier
Deal found 3/5![Frontier logo]()
$113
This Southwest deal was found by Cheapflights users on 3/10. 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 5/133:10 pm
BWI
- SEA
2 stops11h 25m
Southwest
Deal found 3/10![Southwest logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/133:19 pm
BWI
- SEA
2 stops45h 08m
Frontier
Deal found 3/6![Frontier logo]()
$116
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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $199 (American Airlines) |
One-way from | $95 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $417 |
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 March 10, 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 6/3
3:25 pm-11:55 pm
1 stop11h 30m
Seattle/Tacoma Intl
Thu 6/11
9:25 pm-5:20 am
Nonstop4h 55m
$288
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Thu 6/4
5:00 pm-11:05 pm
2 stops9h 05m
Seattle/Tacoma Intl
Mon 6/8
11:05 pm-8:50 am
1 stop6h 45m
$293
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Thu 4/9
6:45 am-5:20 pm
1 stop13h 35m
Seattle/Tacoma Intl
Mon 4/13
11:55 pm-11:50 am
2 stops8h 55m
$299
Quickest round-trip
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Sun 4/26
7:04 am-9:51 am
Nonstop5h 47m
Seattle/Tacoma Intl
Mon 5/4
9:32 pm-5:44 am
Nonstop5h 12m
$317
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Sat 4/25
3:50 pm-10:10 pm
1 stop9h 20m
Seattle/Tacoma Intl
Sun 4/26
2:20 pm-12:35 am
1 stop7h 15m
$318
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Mon 6/1
4:17 pm-10:34 pm
1 stop9h 17m
Seattle/Tacoma Intl
Tue 6/9
10:20 pm-6:28 am
Nonstop5h 08m
$327
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Tue 5/26
7:35 pm-10:26 pm
Nonstop5h 51m
Seattle/Tacoma Intl
Wed 6/10
9:35 pm-5:43 am
Nonstop5h 08m
$328
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Fri 4/24
3:05 pm-12:55 am
2 stops12h 50m
Seattle/Tacoma Intl
Sun 4/26
2:20 pm-12:35 am
1 stop7h 15m
$353
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Wed 3/18
6:10 am-1:05 pm
1 stop9h 55m
Seattle/Tacoma Intl
Mon 4/13
11:55 pm-9:50 am
1 stop6h 55m
$358
BaltimoreSeattle
BWI - SEA
BWISEA
Baltimore/Washington
Tue 4/7
7:04 pm-9:58 pm
Nonstop5h 54m
Seattle/Tacoma Intl
Mon 4/13
12:35 am-11:11 am
1 stop7h 36m
$377
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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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
More
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 March 6, 2026.
The best time to book flights from Baltimore to Seattle is 84 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 $119). Flying from Baltimore to Seattle in July is currently the most expensive (average of $201). 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 March 10, 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 11% on your trip compared to booking a flight in the afternoon.
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.
Denver (DEN) – chosen by Cheapflights users on 63% 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 March 10, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, 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.
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Food
7.1
Overall
8.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - 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 locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Seattle flight routes
Alternative routes for Baltimore to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
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 March 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 March 10, 2026.
Top 8 airlines flying from Baltimore to Seattle
Discover the top 8 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 March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$103 | Average$291 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$126 | Average$268 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$134 | Average$230 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$169 | Average$410 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$179 | Average$330 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$228 | Average$387 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$465 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$274 | Average$444 | FlexibilityNo cancel fee | On-time75% |