What is the cheapest airline that flies from Boston Logan Intl to Sydney Kingsford Smith?

United Airlines and American Airlines are the most popular carriers operating from Boston Logan Intl to Sydney Kingsford Smith

Which airport is the most popular layover for flights between Boston and Sydney?

Dallas (DFW) was the most common stop: 44% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Boston to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 1h 53m.

Which layover airport offers the lowest fares from Boston to Sydney?

Flights via Doha (DOH) offer the lowest average round-trip price of $1,175.

What airlines fly to Sydney?

Qantas Airways, United Airlines and American Airlines are the top three most popular airlines that fly to Sydney from Boston according to our data. Qantas Airways is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Boston to Sydney?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 23h 18m.

When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

Prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport were last updated today.

How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

As of October 2026, there are 8 operators available to choose from for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$545 Cheap Flights from Boston to Sydney in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sydney

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12:55 pm - 8:30 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

27h 35m1 stop Los Angeles

10:40 am - 9:41 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

27h 01m1 stop Los Angeles

$1,297Delta

Wed, Feb 17 - Mon, Mar 1

8:25 am - 9:05 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 40m1 stop Los Angeles

11:50 am - 4:55 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 05m1 stop San Francisco

$1,297United Airlines

Tue, Nov 24 - Tue, Dec 15

5:59 pm - 9:05 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

23h 06m1 stop Los Angeles

9:15 am - 4:45 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 30m1 stop Houston George Bush Intcntl

$1,297United Airlines

Mon, Nov 23 - Tue, Dec 15

8:49 am - 9:00 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 11m1 stop Los Angeles

2:05 pm - 8:53 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

22h 48m2 stops Dallas/Fort Worth New York LaGuardia

$1,298American Airlines

Tue, Feb 9 - Tue, Feb 23

7:45 am - 8:30 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 45m1 stop Los Angeles

10:40 am - 9:41 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

27h 01m1 stop Los Angeles

$1,298Delta

Mon, Feb 1 - Wed, Mar 3

8:40 pm - 7:20 pmBOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m1 stop Doha Hamad Intl

3:50 pm - 2:15 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 25m1 stop Doha Hamad Intl

$1,299Qatar Airways

Mon, Feb 8 - Thu, Feb 25

8:40 pm - 7:20 pmBOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m1 stop Doha Hamad Intl

3:50 pm - 2:15 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 25m1 stop Doha Hamad Intl

$1,299Qatar Airways

Sun, Feb 7 - Tue, Feb 23

5:44 pm - 7:45 pmBOS Boston Logan Intl-SYD Sydney Kingsford Smith

34h 01m2 stops Seattle/Tacoma Intl Honolulu

9:40 pm - 5:17 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

35h 37m2 stops Honolulu Seattle/Tacoma Intl

$1,299Multiple Airlines

Tue, Nov 10 - Sun, Nov 15

9:03 am - 7:45 pmBOS Boston Logan Intl-SYD Sydney Kingsford Smith

42h 42m2 stops Seattle/Tacoma Intl Honolulu

9:40 pm - 5:19 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

35h 39m2 stops Honolulu Seattle/Tacoma Intl

$1,301Multiple Airlines

Thu, Nov 5 - Tue, Dec 8

4:04 pm - 6:55 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

22h 51m1 stop Dallas/Fort Worth

2:05 pm - 9:32 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 27m1 stop Dallas/Fort Worth

$1,344American Airlines

Thu, Feb 11 - Tue, Feb 23

Cheap last minute flights

Enter your travel dates to find the best prices.

2:29 pm - 6:55 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 26m1 stop Dallas/Fort Worth

1:05 pm - 9:26 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 21m1 stop Dallas/Fort Worth

$1,311Qantas Airways

Wed, Oct 21 - Wed, Oct 28

5:45 pm - 8:05 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Los Angeles

1:05 pm - 9:26 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 21m1 stop Dallas/Fort Worth

$1,311Qantas Airways

Wed, Oct 21 - Wed, Oct 28

5:45 pm - 8:05 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Los Angeles

2:05 pm - 9:14 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 09m1 stop Dallas/Fort Worth

$1,312Qantas Airways

Tue, Oct 20 - Tue, Nov 3

8:05 am - 7:55 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 50m2 stops Chicago O'Hare Intl San Francisco

11:20 am - 4:53 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 33m1 stop Los Angeles

$1,336United Airlines

Tue, Oct 20 - Tue, Nov 3

6:17 pm - 7:55 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

22h 38m1 stop San Francisco

9:15 am - 12:46 amSYD Sydney Kingsford Smith-BOS Boston Logan Intl

30h 31m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$1,336United Airlines

Wed, Oct 21 - Wed, Oct 28

5:45 am - 8:00 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 15m2 stops Washington, D.C. Dulles Intl Los Angeles

11:50 am - 4:49 pmSYD Sydney Kingsford Smith-BOS Boston Logan Intl

20h 59m1 stop San Francisco

$1,337United Airlines

Tue, Oct 20 - Tue, Nov 3

10:40 am - 8:20 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 am - 10:03 amSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 43m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,489Air Canada

Wed, Oct 21 - Wed, Oct 28

10:40 am - 8:20 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 am - 10:03 amSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 43m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,490Air Canada

Wed, Oct 21 - Wed, Oct 28

1:55 pm - 8:35 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

27h 40m2 stops San Francisco Vancouver Intl

11:20 am - 10:03 amSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 43m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,491Multiple Airlines

Fri, Oct 23 - Mon, Nov 2

1:55 pm - 8:35 amBOS Boston Logan Intl-SYD Sydney Kingsford Smith

27h 40m2 stops San Francisco Vancouver Intl

11:20 am - 10:03 amSYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 43m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,492Multiple Airlines

Fri, Oct 23 - Mon, Nov 2

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United Airlines flights from Boston to Sydney

Our best United Airlines deals on Boston to Sydney flight tickets

United Airlines

Nov 17

BOS5:30 amBoston Logan Intl

35h 35m

2 stops

SYD9:05 amSydney Kingsford Smith

Dec 2

SYD11:50 amSydney Kingsford Smith

28h 09m

2 stops

BOS11:59 pmBoston Logan Intl

$1,297

United Airlines

Nov 8

BOS6:01 pmBoston Logan Intl

23h 19m

1 stop

SYD9:20 amSydney Kingsford Smith

Nov 24

SYD9:15 amSydney Kingsford Smith

21h 06m

1 stop

BOS2:21 pmBoston Logan Intl

$1,327

United Airlines

Oct 25

BOS1:32 pmBoston Logan Intl

28h 48m

2 stops

SYD9:20 amSydney Kingsford Smith

Nov 2

SYD9:15 amSydney Kingsford Smith

31h 31m

2 stops

BOS12:46 amBoston Logan Intl

$1,336

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

Air Canada

Nov 27

BOS10:25 amBoston Logan Intl

31h 10m

3 stops

SYD9:35 amSydney Kingsford Smith

Dec 4

SYD11:20 amSydney Kingsford Smith

43h 33m

3 stops

BOS2:53 pmBoston Logan Intl

$1,303

Air Canada

Mar 25

BOS5:30 amBoston Logan Intl

36h 05m

2 stops

SYD8:35 amSydney Kingsford Smith

Apr 9

SYD9:20 amSydney Kingsford Smith

26h 07m

2 stops

BOS9:27 pmBoston Logan Intl

$1,333

Air Canada

Oct 29

BOS10:40 amBoston Logan Intl

30h 55m

3 stops

SYD8:35 amSydney Kingsford Smith

Nov 1

SYD11:20 amSydney Kingsford Smith

38h 43m

2 stops

BOS11:03 amBoston Logan Intl

$1,420

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 2/17

12:55 pm-8:30 am

1 stop27h 35m

Sydney Kingsford Smith

Mon 3/1

10:40 am-9:41 pm

1 stop27h 01m

$1,297

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 11/24

8:25 am-9:05 am

1 stop32h 40m

Sydney Kingsford Smith

Tue 12/15

11:50 am-4:55 pm

1 stop21h 05m

$1,297

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 11/23

5:59 pm-9:05 am

1 stop23h 06m

Sydney Kingsford Smith

Tue 12/15

9:15 am-4:45 pm

1 stop23h 30m

$1,297

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 2/9

8:49 am-9:00 am

1 stop32h 11m

Sydney Kingsford Smith

Tue 2/23

2:05 pm-8:53 pm

2 stops22h 48m

$1,298

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 2/1

7:45 am-8:30 am

1 stop32h 45m

Sydney Kingsford Smith

Wed 3/3

10:40 am-9:41 pm

1 stop27h 01m

$1,298

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 2/8

8:40 pm-7:20 pm

1 stop30h 40m

Sydney Kingsford Smith

Thu 2/25

3:50 pm-2:15 pm

1 stop38h 25m

$1,299

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 2/7

8:40 pm-7:20 pm

1 stop30h 40m

Sydney Kingsford Smith

Tue 2/23

3:50 pm-2:15 pm

1 stop38h 25m

$1,299

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 11/10

5:44 pm-7:45 pm

2 stops34h 01m

Sydney Kingsford Smith

Sun 11/15

9:40 pm-5:17 pm

2 stops35h 37m

$1,299

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Thu 11/5

9:03 am-7:45 pm

2 stops42h 42m

Sydney Kingsford Smith

Tue 12/8

9:40 pm-5:19 pm

2 stops35h 39m

$1,301

Quickest round-trip

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Thu 2/11

4:04 pm-6:55 am

1 stop22h 51m

Sydney Kingsford Smith

Tue 2/23

2:05 pm-9:32 pm

1 stop23h 27m

$1,344

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boston to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Boston and Sydney?

Prices are currently typical for flights on this route.

Typical prices usually range from $1,295 to $1,644.
The lowest price recently found on this route was $1,297.

What is the cheapest month to fly to Sydney?

In general, May is the cheapest month to fly from Boston to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,260. If you are unable to visit Sydney during the month of May, then departing from Boston during the month March is also very affordable. Most momondo users find prices during this month for around $1,263.

How far in advance should I book a flight from Boston to Sydney?

You are more likely to see cheaper flights to Sydney from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Boston for as low as $1,318 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 23% on your flight if you consider stops on a Boston to Sydney flight.

How have Boston to Sydney flight prices changed over time?

As of October 2026, prices for Boston to Sydney flights are approximately 49% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Boston to Sydney (BOS to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Sydney

Best Price Found	$545
Fastest flight time	23h 20m
Direct flights	None

The best one-way flight to Sydney from Boston in the past 72 hours is $545. The best round-trip flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,297.

The fastest flight from Boston to Sydney takes 23h 20m

There are no direct flights from Boston to Sydney. There are no popular flight routes from Boston to Sydney.

Search flight deals

Frequently asked questions about flying from Boston to Sydney

How far is Boston Logan Intl to Sydney Kingsford Smith by plane?
Boston Logan Intl and Sydney Kingsford Smith are 10084.4 mi apart from one another. Typically, this will take 23h 20m by plane in normal conditions.
When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
Prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport were last updated today.
How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
As of October 2026, there are 8 operators available to choose from for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to Sydney?
Based on momondo bookings for flights between Boston and Sydney, the leading airline is Qantas Airways, making up 40% of the total bookings. Other popular airlines include United Airlines with 27%, American Airlines with 11%, and Delta with 10%.

Best airlines flying from Boston to Sydney

Compare and see reviews for airlines that fly from Boston to Sydney with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $318	Free Cancellation	Rating 7.8 8,658 reviews	Search Delta flights
Fiji Airways	PriceFrom $703	Free Cancellation	Rating 8.0 259 reviews	Search Fiji Airways flights
Air Canada	PriceFrom $1,087	Free Cancellation	Rating 7.1 11,778 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,102	Free Cancellation	Rating 7.5 1,112 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,118	Free Cancellation	Rating 8.0 675 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $1,131	Free Cancellation	Rating 7.0 12,178 reviews	Search American Airlines flights
United Airlines	PriceFrom $1,145	Free Cancellation	Rating 7.4 10,381 reviews	Search United Airlines flights
Qatar Airways	PriceFrom $1,175	Free Cancellation	Rating 7.3 3,720 reviews	Search Qatar Airways flights

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Manly

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Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to Sydney for you.

Can I find flights from Boston to Sydney with flexible booking policies on momondo?

Yes. All flights to Sydney from Boston on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Boston to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to Sydney right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Boston to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from Boston to Sydney from $545

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sydney departing on 3/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Boston to Sydney

Our best United Airlines deals on Boston to Sydney flight tickets

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Boston to Sydney that are best for you.

See travel insights to Sydney from

How to get the cheapest flight ticket from Boston to Sydney

What is the typical price of a round-trip flight between Boston and Sydney?

What is the cheapest month to fly to Sydney?

How far in advance should I book a flight from Boston to Sydney?

Can stopping save me money on Boston to Sydney flights?

How have Boston to Sydney flight prices changed over time?

What is the cheapest airline that flies from Boston Logan Intl to Sydney Kingsford Smith?

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Boston and Sydney?

Which layover airport offers the lowest fares from Boston to Sydney?

Which layover airport has the shortest travel time from Boston to Sydney?

Which layover airport has the shortest connection time from Boston to Sydney?

When to book flights from Boston to Sydney

Cheap Boston to Sydney (BOS to SYD) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Boston to Sydney

Best airlines flying from Boston to Sydney

Compare and see reviews for airlines that fly from Boston to Sydney with momondo

Traveling to a place near Sydney?

Why use momondo?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales

Fly your favorite airline to Sydney

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Sydney

List of cabin classes available on flights landing in Sydney. Availability may vary depending on flight origin and airline.

Popular cities in Australia

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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