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$251+ Cheap flights from Washington, D.C. (WAS) to Buenos Aires (BUE)

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BUE
May 1 — May 81
Fri 5/1
Fri 5/8
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Buenos Aires

Cheapest flights from Washington, D.C. to Buenos Aires
Explore the most affordable flight options available from Washington, D.C. to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.

This Avianca deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:50 am
IAD
-
EZE
1 stop16h 35m
Avianca
Thu 5/217:10 am
EZE
-
IAD
2 stops20h 35m
Avianca
Deal found 3/30$578
This Avianca deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:35 pm
IAD
-
EZE
1 stop13h 05m
Avianca
Mon 4/274:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/30$584
This Avianca deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:35 pm
IAD
-
EZE
1 stop13h 05m
Avianca
Mon 5/184:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/31$585
This Avianca deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:35 pm
IAD
-
EZE
1 stop13h 05m
Avianca
Sun 5/177:10 am
EZE
-
IAD
2 stops20h 35m
Avianca
Deal found 3/31$586
This Avianca deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:50 am
IAD
-
EZE
1 stop16h 35m
Avianca
Thu 5/287:10 am
EZE
-
IAD
2 stops20h 35m
Avianca
Deal found 3/30$588
This Copa Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/42:21 am
IAD
-
EZE
1 stop21h 29m
Copa Airlines
Sun 5/179:02 am
EZE
-
IAD
1 stop20h 19m
Copa Airlines
Deal found 4/1$589
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:50 am
IAD
-
EZE
1 stop16h 35m
Avianca
Tue 5/197:10 am
EZE
-
IAD
1 stop23h 10m
Avianca
Deal found 3/28$599
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:30 am
IAD
-
EZE
1 stop24h 30m
United Airlines
Thu 8/279:00 pm
EZE
-
IAD
1 stop15h 28m
United Airlines
Deal found 3/31$601
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:03 pm
BWI
-
EZE
1 stop15h 57m
United Airlines
Wed 9/29:00 pm
EZE
-
BWI
1 stop15h 45m
United Airlines
Deal found 3/31$601
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:15 am
DCA
-
EZE
1 stop22h 45m
United Airlines
Wed 9/29:00 pm
EZE
-
DCA
1 stop15h 25m
United Airlines
Deal found 3/31$601
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:50 am
IAD
-
EZE
1 stop21h 50m
Avianca
Sat 5/164:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/30$603
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:35 pm
IAD
-
EZE
1 stop31h 50m
Avianca
Mon 4/204:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/28$605

Find flight deals from Washington, D.C. to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Buenos Aires (BUE). 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 April 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$578
(Avianca)

One-way from

$251
(Avianca)

Popular in

December

Cheapest in

August

Average price

$783
Provider with most accurate pricing for Washington, D.C. (WAS)-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Buenos Aires (BUE) flights.
Search Deals
From Washington, D.C. (WAS) to Buenos Aires (BUE)
Search Deals
One-way flight from Washington, D.C. (WAS) to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Buenos Aires 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 April 1, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 5/2

2:21 am-2:30 am

1 stop23h 09m

Buenos Aires Ministro Pistarini

Fri 5/15

2:49 pm-4:21 am

1 stop14h 32m

$589

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 8/30

5:59 pm-8:00 am

1 stop37h 01m

Buenos Aires Ministro Pistarini

Wed 9/2

9:00 pm-12:29 am

1 stop28h 29m

$618

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 9/27

6:00 am-8:00 am

1 stop25h 00m

Buenos Aires Ministro Pistarini

Thu 10/1

9:00 pm-3:55 pm

1 stop19h 55m

$661

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 4/26

9:32 am-4:30 am

1 stop17h 58m

Buenos Aires Ministro Pistarini

Sun 5/10

5:25 am-4:21 am

1 stop23h 56m

$669

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 5/13

2:21 am-12:50 am

1 stop21h 29m

Buenos Aires Ministro Pistarini

Thu 5/28

9:02 am-4:21 am

1 stop20h 19m

$709

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 4/13

7:33 pm-9:45 am

1 stop13h 12m

Buenos Aires Ministro Pistarini

Mon 4/27

1:10 pm-2:03 pm

1 stop25h 53m

$711

BaltimoreBuenos Aires

BWI - AEP

BWIAEP

Baltimore/Washington

Tue 6/16

5:07 pm-2:50 pm

2 stops20h 43m

Buenos Aires Jorge Newbery

Tue 6/23

9:25 am-6:33 pm

2 stops34h 08m

$721

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 8/9

10:21 am-9:45 am

1 stop22h 24m

Buenos Aires Ministro Pistarini

Sun 8/16

8:10 pm-9:10 am

1 stop14h 00m

$721

BaltimoreBuenos Aires

BWI - AEP

BWIAEP

Baltimore/Washington

Mon 8/10

6:10 pm-2:50 pm

2 stops19h 40m

Buenos Aires Jorge Newbery

Thu 8/20

3:45 pm-1:06 pm

2 stops22h 21m

$721

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 8/13

3:02 pm-8:00 am

1 stop15h 58m

Buenos Aires Ministro Pistarini

Thu 8/20

9:00 pm-6:57 pm

1 stop22h 57m

$721

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Washington, D.C. to Buenos Aires

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 Washington, D.C. to Buenos Aires in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice 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 Washington, D.C.-Buenos Aires flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Buenos Aires 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 Washington, D.C.-Buenos Aires 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 Washington, D.C. to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Washington, D.C. 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 Washington, D.C. to Buenos Aires

How far ahead should I book a flight from Washington, D.C. to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Buenos Aires. Price data was last updated on March 13, 2026.

The best time to book flights from Washington, D.C. to Buenos Aires is 68 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 Washington, D.C. to Buenos Aires?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $278). Flying from Washington, D.C. to Buenos Aires in November is currently the most expensive (average of $633). 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.

How much does it cost to fly round-trip from Washington, D.C. to Buenos Aires?

What’s the top layover airport for flights from Washington, D.C. to Buenos Aires?

Share of 1-stop round-trip flights from Washington, D.C. to Buenos Aires chosen by Cheapflights users in the past 12 months, using the same layover each way.

Panama City (PTY) – chosen by Cheapflights users on 44% of 1-stop itineraries from Washington, D.C. to Buenos Aires on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. to Buenos Aires?

Average round-trip fare for 1-stop flights from Washington, D.C. to Buenos Aires, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Panama City (PTY) is the most affordable 1-stop option, with an average round-trip price of $608.

What’s the fastest layover option from Washington, D.C. to Buenos Aires?

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

Flights via Bogotá (BOG) have the shortest average one-way travel time for 1-stop routes: 13h 15m.

Which airport typically offers the quickest layover for flights from Washington, D.C. to Buenos Aires?

Average layover duration for 1-stop one-way flights from Washington, D.C. to Buenos Aires, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Bogotá (BOG) offer the fastest connection on this route, with an average layover time of 1h 28m.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. 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 Buenos Aires. Reviews last updated April 1, 2026.
Peruse reviews from past customers who have flown with Delta,Copa Airlines, andUnited Airlines from Washington, D.C. to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,366 reviews
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Copa Airlines
7.5
Good
1,577 reviews
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,533 reviews
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,546 reviews
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Avianca
6.5
Okay
2,505 reviews
Delta
7.9
Good
8,366 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. to Buenos Aires?

    Departing from Washington, D.C. to Buenos Aires will take you 13h 12m. The distance between Washington, D.C. and Buenos Aires is about 5222 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to Buenos Aires round-trip?

    According to our current data, Delta ($274), Copa Airlines ($355), and LATAM Airlines ($506) offers the cheapest pricing from Washington, D.C. to Buenos Aires. Delta is 65% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. to Buenos Aires one-way?

    The cheapest airline one-way is Avianca, with whom users have recently found tickets for as low as $258. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Washington, D.C. to Buenos Aires for a low price.

  • What are the most popular routes from Washington, D.C. to Buenos Aires?

    While some choose either Baltimore/Washington - Buenos Aires Ministro Pistarini or Washington, D.C. Reagan-National - Buenos Aires Ministro Pistarini, Washington, D.C. Dulles Intl - Buenos Aires Ministro Pistarini is the most popular route from Washington, D.C. to Buenos Aires.

  • Where are the most common layover locations when flying from Washington, D.C. to Buenos Aires?

    Flights departing from Washington, D.C. and landing in Buenos Aires layover in Atlanta most frequently. Houston is the second most popular location for layovers on flights from Washington, D.C. to Buenos Aires.

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

    Georgia Aquarium, Fox Theatre, and Centennial Olympic Park are the most popular attractions in Atlanta if you're in need of something to do during your layover. Georgia Aquarium, Fox Theatre and Centennial Olympic Park are located about 8.6 mi, 9.3 mi, and 8.4 mi, respectively from Atlanta Hartsfield-Jackson if you are interested in checking them out. Those landing in Atlanta looking to spend some time exploring during their layover can rent a car for about $57 per day.

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

    Houston travelers tend to visit Space Center Houston, House of Blues Houston, and Revention Music Center more than any other notable places. Space Center Houston, House of Blues Houston, and Revention Music Center are located about 33.5 mi, 16.1 mi, and 15.5 mi, respectively from Houston George Bush Intcntl. Those landing in Houston looking to spend some time exploring during their layover can rent a car for about $41 per day.

  • Where are the least popular layover locations for Washington, D.C. to Buenos Aires flights?

    The least popular layover on flights from Washington, D.C. to Buenos Aires is Panama City. Panama City is followed by Bogotá in terms of the least popular layover location on flights from Washington, D.C. to Buenos Aires.

  • Can I find deals for flights from Washington, D.C. to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Buenos Aires.

  • Can I find deals for business class flights from Washington, D.C. to Buenos Aires?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Buenos Aires 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 Washington, D.C. to Buenos Aires?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $278). Flying from Washington, D.C. to Buenos Aires in November is currently the most expensive (average of $633). 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

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Alternative routes for Washington, D.C. to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Jorge Newbery flights
Dulles Intl to Mendoza flights
Dulles Intl to Ushuaia flights
Dulles Intl to Salta flights
Dulles Intl to Mar del Plata flights

Top 6 airlines flying from Washington, D.C. to Buenos Aires

Discover the top 6 airlines that operate flights from Washington, D.C. to Buenos Aires. 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 April 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$825FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$278Average$744FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$344Average$786FlexibilityNo cancel feeOn-time69%
Copa AirlinesCheapest$355Average$802FlexibilityNo cancel feeOn-time70%
AviancaCheapest$536Average$808FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$600Average$831FlexibilityNo cancel feeOn-time71%

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