Cheap flights from Indianapolis to Seattle from $111

In general, February 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 $288. If you don’t want to visit Seattle in February, then you should wait until January to fly from Indianapolis, when ticket prices are also cheap, with an average price of $288.

On average, the least expensive day to fly to Seattle from Indianapolis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $496. 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 $577.

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 $468 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $548. 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 $380 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 $348 on momondo.

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

No. A direct flight is the cheapest option for a flight between Indianapolis to Seattle.

As of October 2026, prices for Indianapolis to Seattle flights are approximately 0% more expensive when compared to flights at the same time last year.

Southwest, Delta, 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 53% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Charlotte (CLT) was the most common stop: 31% 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 Chicago (ORD) have the shortest average one-way travel time: 6h 51m.

Detroit (DTW) has the shortest average layover time for this route: 0h 58m.

The number of flights available between Indianapolis and Seattle is 1 per day as of October 2026. The most frequent departure time is 5:00PM, with 50% of daily flights leaving at noon.

13 flights are operational weekly from Indianapolis to Seattle as of October 2026. The most popular departure day for this route is Sat, with 38% of flights per week taking off on this day.