$473 Cheap Flights from Washington (IAD) to Iasi (IAS)

View $473 flight on Mon, Dec 29, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Iasi (IAS)

Cheap Flights from Washington to Iasi (IAD-IAS)

Prices were available within the past 7 days and start at $473 for one-way flights and $563 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Austrian Airlines
Sun, Dec 7 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$563 Roundtrip, found 5 days ago
$563
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Sun, Dec 7 from Washington to Iasi, returning Mon, Dec 15, priced at $563 found 5 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$567 Roundtrip, found 3 days ago
$567
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $567 found 3 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$572 Roundtrip, found 3 days ago
$572
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $572 found 3 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$581 Roundtrip, found 3 days ago
$581
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $581 found 3 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$582 Roundtrip, found 3 days ago
$582
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $582 found 3 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$586 Roundtrip, found 3 days ago
$586
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $586 found 3 days ago
United
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$588 Roundtrip, found 3 days ago
$588
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $588 found 3 days ago
Lufthansa
Thu, Jan 22 - Fri, Jan 30
IAD
Washington
IAS
Iasi
$615 Roundtrip, found 3 days ago
$615
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Thu, Jan 22 from Washington to Iasi, returning Fri, Jan 30, priced at $615 found 3 days ago
Air France
Tue, Dec 9 - Mon, Dec 15
IAD
Washington
IAS
Iasi
$980 Roundtrip, found 3 days ago
$980
Roundtrip
found 3 days ago
Select Air France flight, departing Tue, Dec 9 from Washington to Iasi, returning Mon, Dec 15, priced at $980 found 3 days ago
KLM
Sat, Dec 20 - Sat, Jan 3
IAD
Washington
IAS
Iasi
$5,451 Roundtrip, found 5 hours ago
$5,451
Roundtrip
found 5 hours ago
Select KLM flight, departing Sat, Dec 20 from Washington to Iasi, returning Sat, Jan 3, priced at $5,451 found 5 hours ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS) cost?
Secure a cheap one-way flight from $473 or cheap return flight from $563 from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS)?
Planning your getaway for December is a great way to save, as it's the cheapest month for flights between IAD and IAS. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to IAS flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS)?
Direct flights from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to IAS?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS) last-minute?
Last-minute bookings from IAD to IAS are usually more expensive. For the lowest rates, start looking for flights ahead of time. That said, if you're flexible with your travel dates, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book an IAD to IAS flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to IAS flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Just pick your flights and choose from our extensive range of hotels, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Iasi Airport (IAS)?
In most cases, you're able to reschedule or cancel your IAD to IAS flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you need further information, go to our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Iasi
Airlines serving
Air France, KLM
Roundtrip price
$562
Distance
4913 mi

Book with confidence

Washington to Iasi Flights

The cheapest times to fly from Washington to Iasi

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Iasi are during the month of December. You can find some of the cheapest flights from Washington to Iasi with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Iasi

Sunday is one of the best days to book for cheap flights from Washington to Iasi: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Iasi

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Iasi in 2025. You can also book with separate airlines for your outbound and return journeys, from $473 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Iasi flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Iasi airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Iasi Flights

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*Available to One Key members.