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 | |
|---|---|---|---|---|---|
| Los Angeles (LAX) | Honolulu (HNL) | One-way | Saver | Depart: Apr 23, 2026 | From $99 Seen: 1 hour ago | |
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: Apr 19, 2026 | From $40 Seen: 1 hour ago | |
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: Jun 6, 2026 | From $89 Seen: 1 hour ago | |
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: May 12, 2026 | From $89 Seen: 38 minutes ago | |
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: May 9, 2026 | From $89 Seen: 7 minutes ago | |
| Seattle (SEA) | Las Vegas (LAS) | One-way | Saver | Depart: May 19, 2026 | From $89 Seen: 1 hour ago | |
| Los Angeles (LAX) | Maui (OGG) | One-way | Saver | Depart: May 17, 2026 | From $33 Seen: 38 minutes ago | |
| San Francisco (SFO) | San Diego (SAN) | One-way | Saver | Depart: May 12, 2026 | From $49 Seen: 1 hour ago | |
| San Francisco (SFO) | San Diego (SAN) | One-way | Saver | Depart: May 20, 2026 | From $49 Seen: 28 minutes ago | |
| San Francisco (SFO) | San Diego (SAN) | One-way | Saver | Depart: May 6, 2026 | From $49 Seen: 20 minutes ago | |
| San Francisco (SFO) | San Diego (SAN) | One-way | Saver | Depart: May 30, 2026 | From $59 Seen: 1 hour ago | |
| San Francisco (SFO) | San Diego (SAN) | One-way | Saver | Depart: May 26, 2026 | From $79 Seen: 2 hours 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 | |
|---|---|---|---|---|---|
| San Francisco (SFO) | San Diego (SAN) | Round-trip | Saver | Jun 9, 2026 - Jun 16, 2026 | From $97 Seen: 2 hours ago | |
| San Francisco (SFO) | San Diego (SAN) | Round-trip | Saver | May 26, 2026 - May 27, 2026 | From $98 Seen: 2 hours ago | |
| San Francisco (SFO) | San Diego (SAN) | Round-trip | Saver | Jun 2, 2026 - Jun 9, 2026 | From $98 Seen: 6 minutes ago | |
| Los Angeles (LAX) | San Francisco (SFO) | Round-trip | Saver | May 19, 2026 - May 20, 2026 | From $97 Seen: 2 hours ago | |
| San Francisco (SFO) | Los Angeles (LAX) | Round-trip | Saver | May 20, 2026 - May 20, 2026 | From $92 Seen: 2 hours ago | |
| Santa Ana (SNA) | Seattle (SEA) | Round-trip | Saver | May 6, 2026 - May 7, 2026 | From $42 Seen: 39 minutes ago | |
| Sacramento (SMF) | San Diego (SAN) | Round-trip | Saver | May 20, 2026 - May 27, 2026 | From $97 Seen: 9 minutes ago | |
| Portland (PDX) | Boston (BOS) | Round-trip | Saver | May 22, 2026 - May 26, 2026 | From $31 Seen: 1 hour ago | |
| Ontario (ONT) | Seattle (SEA) | Round-trip | Saver | May 6, 2026 - May 9, 2026 | From $36 Seen: 2 hours ago | |
| San Diego (SAN) | San Jose (SJC) | Round-trip | Saver | Jun 10, 2026 - Jun 16, 2026 | From $97 Seen: 1 hour ago | |
| San Diego (SAN) | San Jose (SJC) | Round-trip | Saver | Jun 9, 2026 - Jun 16, 2026 | From $97 Seen: 1 hour ago | |
| Oakland (OAK) | Portland (PDX) | Round-trip | Saver | Apr 29, 2026 - May 6, 2026 | From $63 Seen: 38 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.