Cheap flights from Indianapolis to Seattle from $76

In general, January is the cheapest month to fly from Indianapolis to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $287. If you don’t want to visit Seattle in January, then you should wait until September to fly from Indianapolis, when ticket prices are also cheap, with an average price of $293.

On average, the least expensive day to fly to Seattle from Indianapolis is on a Thursday. momondo users have found tickets for Thursday departures for as low as $453. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Indianapolis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $516.

Flying to Seattle from Indianapolis in the evening is the least expensive time of day to depart. momondo users have found prices as low as $441 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $478. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Indianapolis to Seattle/Tacoma Intl for the best Indianapolis - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Indianapolis when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $342 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Indianapolis for as low as $309 on momondo.

There are 4 cabin classes available to choose from on Indianapolis to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 28% on your flight if you consider stops on a Indianapolis to Seattle flight.

As of February 2026, prices for Indianapolis to Seattle flights are approximately 52% more expensive when compared to flights at the same time last year.

Delta, Southwest, and United Airlines are the most popular carriers operating from Indianapolis to Seattle/Tacoma Intl

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Seattle from Indianapolis according to our data. Alaska Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Chicago (ORD) was the most common stop: 52% of momondo users choosing 1-stop flights on this route connected there.

Flights via Charlotte (CLT) offer the lowest average round-trip price of $184.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 6h 35m.

Denver (DEN) has the shortest average layover time for this route: 0h 53m.

The number of flights available between Indianapolis and Seattle is 2 per day as of February 2026. The most frequent departure time is 7:00PM, with 100% of daily flights leaving in the evening.

16 flights are operational weekly from Indianapolis to Seattle as of February 2026. The most popular departure day for this route is Mon, with 19% of flights per week taking off on this day.