Find flights under $100 | Book with Alaska Airlines
Find flights under $100
Spontaneity looks good on you. Discover new cities or visit old stomping grounds—with flights under $100, your next adventure is closer than you think. Find affordable fares from popular West Coast locations like the Bay Area, Los Angeles, and San Diego. Want to narrow your search even more? Browse additional flight deals under $100.
Book one-way flight deals under $100*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: May 9, 2026 | From $89 Seen: 35 minutes ago | |
| Portland (PDX) | Las Vegas (LAS) | One-way | Saver | Depart: Jul 7, 2026 | From $51 Seen: 2 hours ago | |
| Seattle (SEA) | Denver (DEN) | One-way | Saver | Depart: Jul 6, 2026 | From $73 Seen: 59 minutes ago | |
| San Diego (SAN) | Seattle (SEA) | One-way | Saver | Depart: Jun 27, 2026 | From $69 Seen: 2 hours ago | |
| Seattle (SEA) | Newark (EWR) | One-way | Saver | Depart: May 4, 2026 | From $51 Seen: 1 hour ago | |
| Portland (PDX) | San Diego (SAN) | One-way | Saver | Depart: May 12, 2026 | From $83 Seen: 25 minutes ago | |
| Portland (PDX) | San Diego (SAN) | One-way | Saver | Depart: Jun 23, 2026 | From $83 Seen: 2 hours ago | |
| San Francisco (SFO) | Seattle (SEA) | One-way | Saver | Depart: May 13, 2026 | From $79 Seen: 1 hour ago | |
| San Francisco (SFO) | Seattle (SEA) | One-way | Saver | Depart: May 12, 2026 | From $79 Seen: 54 minutes ago | |
| Seattle (SEA) | San Francisco (SFO) | One-way | Saver | Depart: Aug 12, 2026 | From $79 Seen: 2 hours ago | |
| Seattle (SEA) | San Francisco (SFO) | One-way | Saver | Depart: Jun 16, 2026 | From $79 Seen: 1 hour ago | |
| Seattle (SEA) | San Francisco (SFO) | One-way | Saver | Depart: Jun 10, 2026 | From $79 Seen: 45 minutes ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.
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Subscribe to Flight PassBook round-trip flight deals under $100*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Phoenix (PHX) | Round-trip | Saver | May 8, 2026 - May 12, 2026 | From $66 Seen: 28 minutes ago | |
| Seattle (SEA) | San Diego (SAN) | Round-trip | Saver | May 22, 2026 - May 26, 2026 | From $38 Seen: 2 hours ago | |
| Seattle (SEA) | Newark (EWR) | Round-trip | Saver | May 6, 2026 - May 12, 2026 | From $99 Seen: 19 minutes ago | |
| Los Angeles (LAX) | San Francisco (SFO) | Round-trip | Saver | May 19, 2026 - May 20, 2026 | From $97 Seen: 1 hour ago | |
| Santa Ana (SNA) | Seattle (SEA) | Round-trip | Saver | May 7, 2026 - May 10, 2026 | From $47 Seen: 1 hour ago | |
| Seattle (SEA) | Orlando (MCO) | Round-trip | Saver | Oct 8, 2026 - Oct 11, 2026 | From $31 Seen: 2 hours ago | |
| San Jose (SJC) | San Diego (SAN) | Round-trip | Saver | Jun 9, 2026 - Jun 16, 2026 | From $97 Seen: 52 minutes ago | |
| Everett (PAE) | Las Vegas (LAS) | Round-trip | Saver | Jun 21, 2026 - Jun 23, 2026 | From $81 Seen: 1 hour ago | |
| Sacramento (SMF) | San Diego (SAN) | Round-trip | Saver | Jun 23, 2026 - Jun 23, 2026 | From $97 Seen: 14 minutes ago | |
| Seattle (SEA) | Houston (IAH) | Round-trip | Saver | May 22, 2026 - May 25, 2026 | From $40 Seen: 1 hour ago | |
| Fresno (FAT) | San Diego (SAN) | Round-trip | Saver | May 19, 2026 - May 26, 2026 | From $97 Seen: 49 minutes ago | |
| Santa Rosa (STS) | Burbank (BUR) | Round-trip | Saver | Jun 6, 2026 - Jun 8, 2026 | From $31 Seen: 1 hour ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.