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Seattle skyline with Space Needle and Mount Rainier
SEA
Seattle
Ontario California aerial with San Gabriel Mountains
ONT
Ontario

Seattle → Ontario

Frontier Airlines · Round Trip · Nonstop

Save $33 (19% off)
Compared to the typical price of $174
$141$174

per person · round trip

Book This Deal

Flight Details

Cabin
Economy
Departs
Apr 25, 2026
Returns
Apr 26, 2026

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