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Cheap flights from Seattle to Semarang from $1,020

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Semarang departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Semarang

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:15 am - 7:10 amSEA  Seattle/Tacoma Intl-SRG Semarang Achmad Yani
39h 55m2 stops Taipei City Taiwan Taoyuan Intl Singapore Changi
Multiple Airlines Logo
6:25 pm - 4:10 pmSRG  Semarang Achmad Yani-SEA Seattle/Tacoma Intl
35h 45m2 stops Singapore Changi Taipei City Taiwan Taoyuan Intl
$1,020Multiple Airlines
Mon, Sep 28 - Tue, Oct 6
Multiple Airlines Logo
1:15 am - 7:10 amSEA  Seattle/Tacoma Intl-SRG Semarang Achmad Yani
39h 55m2 stops Taipei City Taiwan Taoyuan Intl Singapore Changi
Multiple Airlines Logo
6:25 pm - 10:40 amSRG  Semarang Achmad Yani-SEA Seattle/Tacoma Intl
54h 15m3 stops Singapore Changi Taipei City Taiwan Taoyuan Intl Incheon Intl
$1,119Multiple Airlines
Mon, Sep 28 - Tue, Oct 6
Multiple Airlines Logo
10:15 am - 7:10 amSEA  Seattle/Tacoma Intl-SRG Semarang Achmad Yani
30h 55m1 stop Singapore Changi
Multiple Airlines Logo
7:10 am - 4:10 pmSRG  Semarang Achmad Yani-SEA Seattle/Tacoma Intl
23h 00m2 stops Jakarta Soekarno-Hatta Intl Taipei City Taiwan Taoyuan Intl
$1,247Multiple Airlines
Tue, Sep 29 - Tue, Oct 6
Singapore Airlines Logo
10:15 am - 7:10 amSEA  Seattle/Tacoma Intl-SRG Semarang Achmad Yani
30h 55m1 stop Singapore Changi
Singapore Airlines Logo
6:25 pm - 8:45 amSRG  Semarang Achmad Yani-SEA Seattle/Tacoma Intl
52h 20m1 stop Singapore Changi
$1,357Singapore Airlines
Tue, Sep 29 - Tue, Oct 6
Multiple Airlines Logo
11:45 am - 2:40 pmSEA  Seattle/Tacoma Intl-SRG Semarang Achmad Yani
36h 55m3 stops Hong Kong Intl Kuala Lumpur Intl Jakarta Soekarno-Hatta Intl
Multiple Airlines Logo
7:05 am - 10:35 amSRG  Semarang Achmad Yani-SEA Seattle/Tacoma Intl
41h 30m3 stops Jakarta Soekarno-Hatta Intl Kuala Lumpur Intl Tokyo Narita
$2,642Multiple Airlines
Tue, Sep 29 - Tue, Oct 6

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Customize your flight search to find flights from Seattle to Semarang 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, momondo users made 832,500 searches. Data last updated August 16, 2026.
Use the filters below to find and compare flights from Seattle to Semarang that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

SeattleSemarang

SEA Seattle/Tacoma Intl - SRG Semarang Achmad Yani

SEASRG

Seattle/Tacoma Intl

Mon 9/28

1:15 am-7:10 am

2 stops39h 55m

Semarang Achmad Yani

Tue 10/6

6:25 pm-4:10 pm

2 stops35h 45m

$1,020

SeattleSemarang

SEA Seattle/Tacoma Intl - SRG Semarang Achmad Yani

SEASRG

Seattle/Tacoma Intl

Mon 9/28

1:15 am-7:10 am

2 stops39h 55m

Semarang Achmad Yani

Tue 10/6

6:25 pm-10:40 am

3 stops54h 15m

$1,119
Quickest round-trip

SeattleSemarang

SEA Seattle/Tacoma Intl - SRG Semarang Achmad Yani

SEASRG

Seattle/Tacoma Intl

Tue 9/29

10:15 am-7:10 am

1 stop30h 55m

Semarang Achmad Yani

Tue 10/6

7:10 am-4:10 pm

2 stops23h 00m

$1,247

SeattleSemarang

SEA Seattle/Tacoma Intl - SRG Semarang Achmad Yani

SEASRG

Seattle/Tacoma Intl

Tue 9/29

10:15 am-7:10 am

1 stop30h 55m

Semarang Achmad Yani

Tue 10/6

6:25 pm-8:45 am

1 stop52h 20m

$1,357

SeattleSemarang

SEA Seattle/Tacoma Intl - SRG Semarang Achmad Yani

SEASRG

Seattle/Tacoma Intl

Tue 9/29

11:45 am-2:40 pm

3 stops36h 55m

Semarang Achmad Yani

Tue 10/6

7:05 am-10:35 am

3 stops41h 30m

$2,642

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Seattle to Semarang

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Semarang according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Semarang (SEA to SRG) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Semarang

Fastest flight time

29h 55m

Direct flights

None
The fastest flight from Seattle to Semarang takes 29h 55m
There are no direct flights from Seattle to Semarang. There are no popular flight routes from Seattle to Semarang.
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Frequently asked questions about flying from Seattle to Semarang

  • How far is Seattle/Tacoma Intl to Semarang Achmad Yani by plane?

    Seattle/Tacoma Intl and Semarang Achmad Yani are 8261.9 mi apart from one another. A reasonable flight in good conditions will take 29h 55m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Semarang Achmad Yani Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Semarang Achmad Yani Airport are updated daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Semarang Achmad Yani 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 Seattle/Tacoma Intl Airport to Semarang Achmad Yani Airport.

  • What documentation or ID do you need to fly to Semarang Achmad Yani Airport?

    The travel and health documents you'll need for your trip to Semarang Achmad Yani Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Semarang Achmad Yani Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Seattle to Semarang

  • How do I get Price Alerts for flights from Seattle to Semarang?

    Confirm your travel details to search for the latest offers for flights from Seattle to Semarang. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Seattle to Semarang with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Semarang?

Finding the right flight to Semarang from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Semarang quick and easy, saving you time and money.

Can I find flights from Seattle to Semarang with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Semarang flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Semarang?

Once all potential Seattle to Semarang flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Semarang from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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