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Cheap flights from Seattle to Iaşi from $575

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 Iaşi departing on 1/30. 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
0 bags

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Find the cheapest flights from Seattle to Iaşi

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
3:10 pm - 3:20 pm
SEA
-
IAS
38h 10m2 stops
Lufthansa Logo
4:05 pm - 12:10 pm
IAS
-
SEA
30h 05m2 stops
$575Lufthansa
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
7:00 pm - 11:55 pm
SEA
-
IAS
18h 55m2 stops
Multiple Airlines Logo
5:25 am - 5:05 pm
IAS
-
SEA
21h 40m2 stops
$774Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Lufthansa Logo
6:50 pm - 3:20 pm
SEA
-
IAS
34h 30m2 stops
Lufthansa Logo
5:20 am - 12:20 pm
IAS
-
SEA
17h 00m2 stops
$808Lufthansa
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
7:00 pm - 12:20 am
SEA
-
IAS
19h 20m1 stop
Multiple Airlines Logo
3:20 pm - 10:26 am
IAS
-
SEA
53h 06m2 stops
$1,191Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
8:10 am - 5:50 pm
SEA
-
IAS
23h 40m3 stops
Multiple Airlines Logo
5:25 am - 3:40 pm
IAS
-
SEA
20h 15m2 stops
$1,236Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Multiple Airlines Logo
3:10 pm - 3:20 pm
SEA
-
IAS
38h 10m3 stops
Multiple Airlines Logo
4:05 pm - 11:30 am
IAS
-
SEA
29h 25m3 stops
$1,270Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
8:10 am - 5:50 pm
SEA
-
IAS
23h 40m3 stops
Multiple Airlines Logo
9:45 pm - 10:06 pm
IAS
-
SEA
34h 21m3 stops
$1,302Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Multiple Airlines Logo
8:10 am - 9:00 pm
SEA
-
IAS
26h 50m2 stops
Multiple Airlines Logo
4:05 pm - 3:40 pm
IAS
-
SEA
33h 35m3 stops
$1,418Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
7:00 pm - 12:20 am
SEA
-
IAS
19h 20m1 stop
Multiple Airlines Logo
1:55 pm - 12:35 pm
IAS
-
SEA
32h 40m1 stop
$2,398Multiple Airlines
Fri, Jan 30 - Fri, Feb 6

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Iaşi 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 December 18, 2025.
Use the filters below to find and compare flights from Seattle to Iaşi that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 1/30

3:10 pm-3:20 pm

2 stops38h 10m

Iasi

Fri 2/6

4:05 pm-12:10 pm

2 stops30h 05m

$575

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Thu 1/29

7:00 pm-11:55 pm

2 stops18h 55m

Iasi

Thu 2/5

5:25 am-5:05 pm

2 stops21h 40m

$774

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 4/17

6:50 pm-3:20 pm

2 stops34h 30m

Iasi

Fri 4/24

5:20 am-12:20 pm

2 stops17h 00m

$808

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 1/30

7:00 pm-12:20 am

1 stop19h 20m

Iasi

Fri 2/6

3:20 pm-10:26 am

2 stops53h 06m

$1,191

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Thu 1/29

8:10 am-5:50 pm

3 stops23h 40m

Iasi

Thu 2/5

5:25 am-3:40 pm

2 stops20h 15m

$1,236

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 1/30

3:10 pm-3:20 pm

3 stops38h 10m

Iasi

Fri 2/6

4:05 pm-11:30 am

3 stops29h 25m

$1,270

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Thu 1/29

8:10 am-5:50 pm

3 stops23h 40m

Iasi

Thu 2/5

9:45 pm-10:06 pm

3 stops34h 21m

$1,302

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 1/30

8:10 am-9:00 pm

2 stops26h 50m

Iasi

Fri 2/6

4:05 pm-3:40 pm

3 stops33h 35m

$1,418

SeattleIaşi

SEA - IAS

SEAIAS

Seattle/Tacoma Intl

Fri 1/30

7:00 pm-12:20 am

1 stop19h 20m

Iasi

Fri 2/6

1:55 pm-12:35 pm

1 stop32h 40m

$2,398

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Iaşi from

How to get the cheapest flight ticket from Seattle to Iaşi

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

What is the cheapest day to depart on your flight to Iaşi?

The cheapest day to depart on your flight to Iaşi is on a Thursday when prices can be found for as low as $1,240. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Iaşi is Wednesday, with ticket prices averaging around $1,792.

What is the cheapest time of day to depart on your flight to Iaşi?

According to our data, the cheapest time of day to fly to Iaşi is in the morning. momondo users have found flights departing from Seattle to Iaşi in the morning for as low as $1,092. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Iaşi is at noon when prices are around $1,340.

When to book flights from Seattle to Iaşi

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

Cheap Seattle to Iaşi (SEA to IAS) flight deals and tips

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

Fastest flight time

34h 30m

Direct flights

None
The fastest flight from Seattle to Iaşi takes 34h 30m
There are no direct flights from Seattle to Iaşi. There are no popular flight routes from Seattle to Iaşi.
Search flight deals

  • How far is Seattle/Tacoma Intl to Iasi by plane?

    The distance between Seattle/Tacoma Intl and Iasi is about 5638.5 mi. A reasonable flight in good conditions will take 34h 30m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Iasi Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Iasi Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Iasi Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Iasi Airport.

  • What documentation or ID do you need to fly to Iasi Airport?

    The travel and health documents required for your trip to Iasi Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Iasi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Iaşi?

Best airlines flying from Seattle to Iaşi

Compare and see reviews for airlines that fly from Seattle to Iaşi with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $769Free CancellationRating
6.8
7,635 reviews
Search Lufthansa flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Iaşi from Seattle.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Iaşi.

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

If you are not ready to book a flight from Seattle to Iaşi now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Iaşi and let you know when they change.

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