Cheap flights to Indiana Dunes National Park from Seattle

Round trips from Seattle from $297. Fly into Chicago (MDW). Cheapest dates, deal ratings and where to book.

• Chicago: $297, 2026-11-04 to 2026-11-08
• Chicago: $302, 2026-11-05 to 2026-11-08
• Chicago: $358, 2026-10-29 to 2026-11-01
• Chicago: $363, 2027-01-07 to 2027-01-10
• Chicago: $425, 2026-10-09 to 2026-10-12

Nearby

• Gateway Arch
• Cuyahoga Valley
• Mammoth Cave
• New River Gorge
• Great Smoky Mountains
• Isle Royale
• Shenandoah
• Voyageurs