Flights Indianapolis → Seattle
As of September 2026, economy flights from Indianapolis to Seattle have a typical range USD 173–643, median USD 174. Full range across all 157 offers: USD 169–1495. We analyzed 157 offers from 11 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Indianapolis → Seattle
Based on 157 offers · September 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Indianapolis → Seattle
Add-on pricing from the cheapest available offer per airline · September 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| United | Included | USD 35 | — |
| Southwest Airlines | Included | Included | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| Frontier Airlines | — | — | — |
| Alaska Airlines | Included | USD 35 | — |
| Alaska | — | USD 48 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Indianapolis to Seattle cost?
Based on 157 offers · September 2026
Indianapolis to Seattle flights ranged from USD 169 to USD 1495 across 157 offers analyzed in September 2026. The chart below shows how prices distributed across all 157 offers.
These 157 offers (September 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 173 and USD 226
What hidden fees do Indianapolis to Seattle flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Indianapolis to Seattle routes. The breakdown below is based on 157 offers analyzed in September 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| UA | 45 | 24% |
| WN | 0 | 0% |
| DL | 45 | 9% |
| AA | 47 | 17% |
| F9 | 10 | 6% |
| AS | 45 | 17% |
| Alaska | 48 | 21% |
American Airlines: base ~USD 126 + fees USD 47 = ~USD 173 total. Frontier Airlines: base ~USD 167 + fees USD 10 = ~USD 177 total.
American Airlines's USD 47 ancillary fees narrow the gap with Frontier Airlines's lower-fee model — the USD 41 base difference shrinks to USD 4 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Alaska charges 4.8x more in ancillary fees than F9 on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Indianapolis to Seattle?
11 airlines flew Indianapolis to Seattle in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (United Airlines), fares ranged USD 173–209 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 United Airlines | 20 | 173–209 | 173 | 45 (26%) |
 American Airlines | 19 | 173–467 | 173 | 47 (27%) |
 United | 12 | — | 174 | n/a |
 Southwest | 8 | — | 174 | n/a |
 Delta | 14 | — | 174 | n/a |
 American | 16 | — | 174 | n/a |
 Frontier Airlines | 1 | — | 177 | 10 (6%) |
 Southwest Airlines | 20 | 173–204 | 179 | 0 (0%) |
 Alaska | 1 | — | 226 | 48 (21%) |
 Alaska Airlines | 8 | 250–269 | 269 | 45 (17%) |
 Delta Air Lines | 38 | 173–937 | 379 | 45 (12%) |
Where do the best Indianapolis → Seattle prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Indianapolis to Seattle flights
- Full-service carriers on Indianapolis–Seattle cost 1.2x more than budget airlines (USD 218 vs USD 177 median; overall median USD 174).
- Alaska charges 4.8x more in ancillary fees than F9 — USD 48 vs USD 10 avg per booking.
- The same route priced USD 13 apart depending on where it was booked — the lowest median was USD 172. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Indianapolis to Seattle cost?
- Based on 157 offers analyzed, Indianapolis to Seattle flights range from USD 169 to USD 1495, with a median price of USD 174. Search for your specific dates →
- What hidden fees should I expect on Indianapolis to Seattle flights?
- On average, ancillary fees (bags, seat selection) add USD 37 to the base fare on Indianapolis to Seattle flights. See itemized fees for your itinerary →
- Which airline is cheapest on Indianapolis to Seattle including all fees?
- United Airlines has the lowest median fare on Indianapolis to Seattle at USD 173 (median across 20 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Indianapolis–Seattle flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 172. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Indianapolis to Seattle routes?
- Indianapolis to Seattle has 11 airlines competing, creating a price range from USD 169 to USD 1495 across 157 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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