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$129+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
may. 3 — may. 101
sáb. 5/3
sáb. 5/10
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 January or February, booked 77 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap 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 abril 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$241
(CheapOair)

One-way from

$129
(Frontier)

Popular in

December

Cheapest in

January

Average price

$446
Provider with most accurate pricing for Baltimore/Washington-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Baltimore/Washington-Seattle/Tacoma Intl flights.
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From Baltimore/Washington to Seattle/Tacoma Intl
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One-way flight from Baltimore/Washington to Seattle/Tacoma Intl
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Baltimore to Seattle

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

This CheapOair deal was found by Cheapflights users on 4/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/166:12 pmBWI - SEA
1 stop9h 32mFrontier
dom. 5/1812:21 pmSEA - BWI
1 stop26h 01mFrontier
Deal found 4/28$241
This CheapOair deal was found by Cheapflights users on 4/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/157:17 amBWI - SEA
1 stop10h 08mMultiple Airlines
dom. 5/1812:21 pmSEA - BWI
1 stop26h 01mMultiple Airlines
Deal found 4/28$242
This Delta deal was found by Cheapflights users on 4/28. 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.
mar. 6/246:00 amBWI - SEA
1 stop7h 30mDelta
mar. 6/245:30 pmSEA - BWI
1 stop9h 17mDelta
Deal found 4/28$243
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/17:57 pmBWI - SEA
2 stops31h 13mSpirit Airlines
mar. 6/33:20 pmSEA - BWI
1 stop11h 50mSpirit Airlines
Deal found 4/28$245
This American Airlines deal was found by Cheapflights users on 4/28. 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.
mar. 6/37:26 amBWI - SEA
1 stop8h 21mAmerican Airlines
lun. 6/912:05 amSEA - BWI
1 stop8h 11mAmerican Airlines
Deal found 4/28$252
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
mar. 5/277:05 pmBWI - SEA
Nonstop5h 55mAlaska Airlines
mar. 6/310:27 pmSEA - BWI
Nonstop5h 02mAlaska Airlines
Deal found 4/28$282
This Sun Country Air deal was found by Cheapflights users on 4/28. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/3012:26 pmBWI - SEA
1 stop13h 25mSun Country Air
dom. 6/111:59 pmSEA - BWI
1 stop8h 31mSun Country Air
Deal found 4/28$295
This United Airlines deal was found by Cheapflights users on 4/28. 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.
sáb. 6/217:00 pmBWI - SEA
1 stop8h 59mUnited Airlines
sáb. 6/287:00 pmSEA - BWI
1 stop7h 10mUnited Airlines
Deal found 4/28$299
This Southwest deal was found by Cheapflights users on 4/28. 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.
lun. 6/92:20 pmBWI - SEA
Nonstop5h 50mSouthwest
lun. 6/169:10 pmSEA - BWI
Nonstop5h 00mSouthwest
Deal found 4/28$307

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 abril 28, 2025.
Use the filters below to find and compare flights from Baltimore to Seattle that are best for you.

Fly from

Baltimore

Fly to

Seattle

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

vie. 5/16

6:12 pm-12:44 am

1 stop9h 32m

Seattle/Tacoma Intl

dom. 5/18

12:21 pm-5:22 pm

1 stop26h 01m

$241

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

jue. 5/15

7:17 am-2:25 pm

1 stop10h 08m

Seattle/Tacoma Intl

dom. 5/18

12:21 pm-5:22 pm

1 stop26h 01m

$242

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

mar. 6/24

6:00 am-10:30 am

1 stop7h 30m

Seattle/Tacoma Intl

mar. 6/24

5:30 pm-5:47 am

1 stop9h 17m

$243

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

dom. 6/1

7:57 pm-12:10 am

2 stops31h 13m

Seattle/Tacoma Intl

mar. 6/3

3:20 pm-6:10 am

1 stop11h 50m

$245

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

mar. 6/3

7:26 am-12:47 pm

1 stop8h 21m

Seattle/Tacoma Intl

lun. 6/9

12:05 am-11:16 am

1 stop8h 11m

$252

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

mar. 5/27

7:05 pm-10:00 pm

Nonstop5h 55m

Seattle/Tacoma Intl

mar. 6/3

10:27 pm-6:29 am

Nonstop5h 02m

$282

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

vie. 5/30

12:26 pm-10:51 pm

1 stop13h 25m

Seattle/Tacoma Intl

dom. 6/1

11:59 pm-11:30 am

1 stop8h 31m

$295

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

sáb. 6/21

7:00 pm-12:59 am

1 stop8h 59m

Seattle/Tacoma Intl

sáb. 6/28

7:00 pm-5:10 am

1 stop7h 10m

$299

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

lun. 6/9

2:20 pm-5:10 pm

Nonstop5h 50m

Seattle/Tacoma Intl

lun. 6/16

9:10 pm-5:10 am

Nonstop5h 00m

$307

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

lun. 5/5

6:12 pm-12:44 am

1 stop9h 32m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 19 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
FareScanPrice Accuracy-Trust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Baltimore-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Baltimore-Seattle flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

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

The best time to book flights from Baltimore to Seattle is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in July is currently the most expensive (average of $405). 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 abril 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Baltimore to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Baltimore to Seattle. Price data was last updated on March 30, 2025.

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

Weekly flight availability from Baltimore to Seattle

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

The most flights from BWI to SEA are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Seattle by month

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

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

Temperature in Seattle by month

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

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

Reviews of airlines servicing Seattle

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 abril 28, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Baltimore to Seattle to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,949 reviews
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,292 reviews
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,401 reviews
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,949 reviews

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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

Related info for your journey

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

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

    To fly from Baltimore to Seattle, you need to book a flight from Baltimore/Washington (BWI) to Seattle/Tacoma Intl (SEA). Nonstop flights to Seattle/Tacoma Intl from Baltimore/Washington take 5h 39m on average. When it comes time to book airfare, you have a few options: there are 4 outbound flights from Baltimore/Washington to Seattle/Tacoma Intl offered by 9 different airlines.

  • How popular is this Baltimore to Seattle flight route?

    The Baltimore/Washington to Seattle/Tacoma Intl flight path was viewed by 21 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, Frontier ($241), Delta ($243), and Spirit Airlines ($245) offers the cheapest pricing from Baltimore to Seattle. Frontier is 42% cheaper than the average price of flights available within the next 90 days to this destination.

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

    One-way options have recently been found by users for as low as $129 on Frontier. Other airlines that offer cheap prices include Delta from $140 and Spirit Airlines from $142 one-way.

  • What are the most reliable airlines from Baltimore to Seattle?

    Consider Alaska Airlines (72%), Air Tahiti Nui (72%) or Hawaiian Airlines (71%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Seattle.

  • What are the cheapest flights from Baltimore to Seattle?

    The cheapest flight price from Baltimore to Seattle is $128. On average you can expect to pay $850. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $184.

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

    Most of the time, Baltimore to Seattle flights that have layovers will stop in Charlotte. Charlotte is followed by Chicago in terms of the most popular layover location on flights from Baltimore to Seattle.

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

    Most Charlotte visitors opt to spend their time experiencing Carowind, Mint Museum Uptown, and NASCAR Hall of Fame. Carowind, Mint Museum Uptown, and NASCAR Hall of Fame are located about 8.2 mi, 5.4 mi, and 5.7 mi, respectively from Charlotte Douglas. Travelers can rent a car at Charlotte Douglas for an average daily rate of $55 to make sightseeing during their layover a little easier.

  • What are some popular points of interest to see during a layover in Chicago?

    The majority of Chicago visitors spend their time at Magnificent Mile, Grant Park, and River North. Magnificent Mile, Grant Park and River North are located about 15.5 mi, 16.2 mi, and 15.0 mi, respectively from Chicago O'Hare Intl if you are interested in checking them out. Those looking to explore during their layover in Chicago can rent a car from Chicago O'Hare Intl for about $55 per day.

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

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

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

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

  • How can I find direct flights from Baltimore to Seattle?

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in July is currently the most expensive (average of $405). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Baltimore?

Book flights to Baltimore if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Kent
Aberdeen
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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Alternative routes for Baltimore to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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 abril 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$188FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$140Average$261FlexibilityNo cancel feeOn-time65%
DeltaCheapest$206Average$345FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$207Average$379FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$244Average$368FlexibilityNo cancel feeOn-time83%
Hawaiian AirlinesCheapest$277Average$444FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$277Average$488FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$426FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$341Average$569FlexibilityNo cancel feeOn-time63%

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