$49 Cheap flight deals from Seattle (SEA) to Castro Valley (SJC)

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This Weekend's Flight Deals from Seattle to Castro Valley

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 13 - Wed, Sep 23
SEA
Seattle - Tacoma Intl.
SFO
San Francisco Intl.
$275 Roundtrip, found 1 hour ago
$275
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, Sep 13 from Seattle - Tacoma Intl. to San Francisco Intl., returning Wed, Sep 23, priced at $275 found 1 hour ago
Sun, Sep 13 - Wed, Sep 23
SEA
Seattle - Tacoma Intl.
OAK
Oakland Intl.
$275 Roundtrip, found 12 hours ago
$275
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sun, Sep 13 from Seattle - Tacoma Intl. to Oakland Intl., returning Wed, Sep 23, priced at $275 found 12 hours ago
Sat, Sep 12 - Sun, Sep 13
SEA
Seattle - Tacoma Intl.
SJC
Norman Y. Mineta San Jose Intl.
$386 Roundtrip, found 19 hours ago
$386
Roundtrip
found 19 hours ago
Select Bargain Flight flight, departing Sat, Sep 12 from Seattle - Tacoma Intl. to Norman Y. Mineta San Jose Intl., returning Sun, Sep 13, priced at $386 found 19 hours ago
Sat, Sep 12 - Wed, Sep 23
PAE
Seattle Paine Field Intl. Airport
OAK
Oakland Intl.
$422 Roundtrip, found 5 days ago
$422
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, Sep 12 from Seattle Paine Field Intl. Airport to Oakland Intl., returning Wed, Sep 23, priced at $422 found 5 days ago

Airfares from $49 One Way, $97 Round Trip from Seattle to Castro Valley

Prices starting at $97 for return flights and $49 for one-way flights to Castro Valley were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 5 - Sun, Nov 8
SEA
Seattle
OAK
Oakland
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Nov 5 from Seattle to Oakland, returning Sun, Nov 8, priced at $97 just found
Thu, Nov 12 - Tue, Nov 17
PAE
Seattle
SFO
San Francisco
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Nov 12 from Seattle to San Francisco, returning Tue, Nov 17, priced at $97 just found
Wed, Oct 21 - Tue, Nov 3
SEA
Seattle
OAK
Oakland
$97 Roundtrip, found 1 day ago
$97
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Oct 21 from Seattle to Oakland, returning Tue, Nov 3, priced at $97 found 1 day ago
Tue, Oct 6 - Thu, Oct 15
SEA
Seattle
SFO
San Francisco
$133 Roundtrip, found 14 hours ago
$133
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Tue, Oct 6 from Seattle to San Francisco, returning Thu, Oct 15, priced at $133 found 14 hours ago
Thu, Dec 10 - Tue, Dec 15
PAE
Seattle
OAK
Oakland
$203 Roundtrip, found 2 days ago
$203
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Dec 10 from Seattle to Oakland, returning Tue, Dec 15, priced at $203 found 2 days ago

Castro Valley economy flight packages

Price found within the past 48 hours. Click for updated prices.
Terrace Inn and Suites
2.5-star property

Terrace Inn and Suites

8.2/10 Very Good! (481 reviews)

Oct 9 - Oct 11

2 night stay

Seattle (SEA) to Oakland (OAK)

Southwest Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $605, price is now $416 per person
$416
per person
found 12 hours ago

Claremont Resort & Club
5.0-star property

Claremont Resort & Club

9/10 Wonderful! (1,101 reviews)

Oct 30 - Nov 4

5 night stay

Seattle (SEA) to Oakland (OAK)

Southwest Airlines • Coach

Oakland (OAK) to Seattle (SEA)

Alaska Airlines • Coach
Save 100% on your flight
Price was $1,748, price is now $1,128 per person
$1,128
per person
found 3 hours ago
When I walked down the hall to my room and saw the worn carpets and dirty elevator (finger prints and dirt all around the bottom of the elevator) I had a feeling I made a mistake booking here. The initial room I was given smelled badly of mold and old carpet. The couch was so dirty and stained it looked like it came from a seedy motel out of a movie. It was disgusting. I called down to have my room changed and the front desk said they had to have a manager do that. I had to call them twice to make it happen. The second room was much nicer but still dated. It at least did not smell and didn't have stains on the furniture. It makes me wonder whether they decided that I would be fine 1 star room, or their management is so inept to not know which rooms should be taken out of rotation and fixed. It took me a full 24 hours to get over the horror, and I was going to be there for only three days. The incredible views from my second room really helped and the spa quality soaps, shampoos and lotion were also soothing. The bathrooms are really nice. The courts and club were definitely well maintained. There are few staff people there to help and the hallways were a little dingy and creepy. In kindness, I would guess that the hotel (it's no longer a resort) is going through a rough patch. My recommendation for them is to start with doing a better job with the overall cleanliness of the hotel. They should see it from a customer's point of view rather than a check list.

Reviewed on Sep 7, 2026

Geyserville Inn
3.5-star property

Geyserville Inn

9.2/10 Wonderful! (1,000 reviews)

Oct 30 - Nov 4

5 night stay

Seattle (SEA) to Oakland (OAK)

Southwest Airlines • Coach

Oakland (OAK) to Seattle (SEA)

Alaska Airlines • Coach
Save 100% on your flight
Price was $857, price is now $603 per person
$603
per person
found 9 hours ago
There was an absolute rager of a wedding at the property. Unfortunately will not return.

Reviewed on Sep 6, 2026

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More About Flying To Castro Valley from Seattle

Route Information for Flights from Seattle to Castro Valley

Origin Airport IATA Code
SEA
Destination Airport IATA Code
SJC
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Seattle to Castro Valley

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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.