Cheap flights from Seattle to Indianapolis from $125

In general, January is the cheapest month to fly from Seattle to Indianapolis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $298. If you are unable to visit Indianapolis during the month of January, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $324.

Our data shows that Wednesday is the least expensive day to fly to Indianapolis. Tickets to fly out on this day can be as low as $394. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Indianapolis on Tuesday is $536.

Flying to Indianapolis from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $370 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $476 on average. Flights to Indianapolis from Seattle in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Indianapolis from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Indianapolis for around $389 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Indianapolis from Seattle for as low as $217 on momondo.

There are 3 cabin classes available to choose from on Seattle to Indianapolis 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 6% on your flight if you consider stops on a Seattle to Indianapolis flight.

As of May 2026, prices for Seattle to Indianapolis flights are approximately 30% more expensive when compared to flights at the same time last year.

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

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Indianapolis from Seattle according to our data. Alaska Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Indianapolis. Keep in mind that there are 7 different airlines that fly to Indianapolis on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between Seattle and Indianapolis have experienced a delay on any given week. The average delay length over the past 12 months has been 114 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Alaska Airlines have had the least number of delays on this route over the last 12 months; with about 21% of their flights experiencing any sort of delay.

Chicago (ORD) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Austin (AUS) offer the lowest average round-trip price of $413.

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 6h 49m.

Chicago (ORD) has the shortest average layover time for this route: 1h 34m.

3 flights are operational daily from Seattle to Indianapolis as of May 2026. The most popular departure time for this route is 10:00PM, with 60% of flights per day taking off in the evening.

22 flights are operational weekly from Seattle to Indianapolis as of May 2026. The most popular departure day for this route is Sat, with 18% of flights per week taking off on this day.