$23 Cheap Flights to Castro Valley, CA

Flights to Castro Valley at a glance

Traveling to Castro Valley is easy—simply select from a range of full-service or budget airlines. Compare flight durations and prices to find cheap flights to Castro Valley that align with your travel plans and budget, ensuring you can explore the city’s renowned attractions and neighborhoods.

• Major airports near Castro Valley: San Francisco International Airport (SFO), Oakland International Airport (OAK)
• Closest (typical) airport to Castro Valley: Oakland International Airport, OAK (around 7 miles)
• Flights per week: 8,600+ flights arriving across Castro Valley airports
• Number of airlines that fly to Castro Valley: around 85+ carriers

Popular airports near Castro Valley

Castro Valley is a lively city perfect for outdoor activities, family getaways, and urban escapes. Visitors are drawn to its rich culture, entertainment options, and stunning scenery. Conveniently, there are two major airports near Castro Valley, making it easy to plan your travel arrangements.

• San Francisco International Airport (SFO): Situated in San Mateo County, California, approximately 17 miles from Castro Valley, this airport facilitates both domestic and international travel. It connects to over 240 domestic cities and around 340 international destinations. Travelers have the option to enhance their journey by selecting from first class, business class, and premium economy class seating for added comfort, depending on the chosen airline and route. Key airlines operating from SFO include United, Alaska Airlines, and Delta.
• Oakland International Airport (OAK): Found in Alameda County, California, roughly 7 miles from Castro Valley, this airport offers a mix of domestic and international flights. It connects around 100 domestic cities and more than 20 international locations. Passengers can choose to upgrade their experience by opting for premium economy, first class, or business class seating based on the airline and route. Notable airlines at this airport include Southwest Airlines, Alaska Airlines, and Volaris.

Top routes to Castro Valley

• Los Angeles (LAX) to Castro Valley (SFO/OAK), with one-way tickets available from around $45
• New York (JFK/LGA) to Castro Valley (SFO/OAK), with one-way airfare from around $100
• San Diego (SAN) to Castro Valley (SFO/OAK), with one-way flights starting at around $30
• Las Vegas (LAS) to Castro Valley (SFO/OAK), with one-way tickets available from around $40
• Seattle (SEA) to Castro Valley (SFO/OAK), with one-way fares starting at around $60

Cheapest routes to Castro Valley

• San Diego (SAN) to Castro Valley (SFO/OAK), with cheap one-way fares from around $30
• Orange County (SNA) to Castro Valley (SFO/OAK), with low-cost one-way tickets from around $30
• Burbank (BUR) to Castro Valley (SFO/OAK), with low one-way fares from around $30
• Ontario (ONT) to Castro Valley (SFO/OAK), with low one-way fares from around $30
• Palm Springs (PSP) to Castro Valley (SFO/OAK), with affordable one-way prices from around $30

*Flight times and fares vary by season and availability and are based on one-way routes

Top airlines with flights to Castro Valley

• United: This airline operates flights to both San Francisco International Airport (SFO) and Oakland International Airport (OAK), making up about 28% of arrivals in Castro Valley. The typical one-way fare hovers around $1020, with options for premium service including premium economy, business, and first class based on the specific route.
• American Airlines: Offering routes to San Francisco International Airport (SFO), this carrier is responsible for approximately 13% of arrivals to Castro Valley. Travelers can expect an average one-way fare of about $410, with premium options such as premium economy, business, and first class depending on the route.
• Southwest Airlines: This airline connects to San Francisco International Airport (SFO) and Oakland International Airport (OAK), contributing roughly 13% of arrivals to Castro Valley. One-way fares average around $240, making it a budget-friendly choice for travelers.
• Delta: With flights to both San Francisco International Airport (SFO) and Oakland International Airport (OAK), Delta holds about 12% of the arrival market in Castro Valley. The average cost for a one-way ticket is around $320, and premium service options may include premium economy, business, and first class depending on the route.
• Alaska Airlines: This airline flies into San Francisco International Airport (SFO) and Oakland International Airport (OAK), accounting for approximately 10% of arrivals to Castro Valley. The average one-way fare is about $250, with premium service options available for business and first class based on the route.

Best time to fly to Castro Valley

The most popular months for travelers to fly to Castro Valley are January, March, and April, when peak temperatures in Castro Valley can reach up to 56.5°F in April. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 68°F. For better deals, May usually offers the lowest average one-way fare around $240, roughly 11% cheaper than the yearly average. Looking for additional cheaper months to fly? September, October, and February offer average one-way fares roughly ranging from $245 to $260, making them good options for flexible travelers.

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

How to save money on a flight to Castro Valley

Getting some of the best deals on flights to Castro Valley is all about timing and flexibility. Here are some key tips to help you save:

1. Compare flight options—use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
2. Set up price alerts—as an Expedia member you can use Price Tracking to receive notifications when flight prices change.
3. Bundle and save—book a flight and unlock a hotel deal on Expedia*, or explore our Castro Valley hotel and flight deals.
4. Think about luggage-nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your baggage allowance before confirming your booking to avoid excess baggage fees at the airport.
5. Earn miles—you can earn airline miles when you book your Castro Valley flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in Castro Valley

Castro Valley welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Castro Valley efficiently:

• Public transportation: From San Francisco International Airport, San Francisco Intl. Airport Station, a metro station, is located about 0.2 miles from the airport and can be reached on foot, while San Bruno Station, a train station, is approximately 2.4 miles away by car.
• Hotel transfer: Transfers offer a convenient way to reach your hotel in Castro Valley, with private rides that can be arranged in advance.
• Car rental: Renting a car in Castro Valley is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Castro Valley on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.

Where to stay around Castro Valley

• Hayward: Located 2 miles drive away from Castro Valley, Hayward is a vibrant city offering a blend of family-friendly activities and urban experiences. Visitors can explore educational institutions, enjoy shopping at the local mall, or catch a performance at the Oakland Arena. Outdoor enthusiasts will appreciate the nearby San Francisco Bay and both modern and historic college campuses, making it a great spot for those looking to balance city life with nature.
• San Leandro: San Leandro is located 4 miles drive away from Castro Valley and is an excellent destination for families and outdoor lovers. The city boasts an array of venues including shopping centers and arena entertainment facilities. Visitors can enjoy events at the Oakland Arena, stroll around the scenic San Francisco Bay, or visit Jack London Square, a lively area filled with dining and shopping options, perfect for a day out in the sun.
• Sequoyah: Sequoyah is located 6 miles drive away from Castro Valley and is a charming neighborhood ideal for those seeking outdoor activities and picturesque scenery. This area features recreational parks, shopping spots, and golf courses, making it perfect for a leisurely day. Notable attractions include the Oakland Arena and the beautiful vistas along San Francisco Bay, offering both relaxation and entertainment for visitors of all ages.

Tips for short-haul flights to Castro Valley

For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother:

• Pack light and skip checked bags—when flying with budget airlines, it's often more cost-effective to travel with just a carry-on. Maximize space by packing travel-sized toiletries, wearing your heaviest clothing, and coordinating outfits ahead of time. This approach also allows you to bypass waiting at baggage claim upon arrival.
• Bring your own entertainment—many short-haul flights may not provide in-flight entertainment options. To keep yourself entertained, download TV shows, movies, music, or podcasts beforehand, and consider bringing a book. Don't forget to charge your devices fully before you board.
• Arrive at the airport in plenty of time—even for short or domestic flights, it's advisable to arrive at least 1.5 to 2 hours prior to departure, taking into account potential traffic and security lines.
• Bring your own snacks and water—pack some snacks and a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to Castro Valley

Flying long-haul sometimes requires extra planning to ensure a comfortable journey:

• Select your seat in advance—for extended flights, choosing your seat is essential for comfort. Full-service airlines may allow you to select your seat for free once online check-in begins, typically 24–48 hours before your flight. Some airlines may provide the option to select seats even earlier.
• Arrive at the airport in plenty of time—aim to be at the airport at least 3 hours prior to departure for international flights to accommodate check-in, security, and immigration processes.
• Relax at the airport—if you find yourself with extra time, take the opportunity to browse the shops, enjoy a coffee, or unwind at the gate or in a departure lounge if you have access. Airport Wi-Fi is generally free and available.
• Adjust to the new time zone mid-flight—begin syncing your body clock by changing your watch and adjusting your sleep schedule to align with your destination's time zone. Try to sleep or stay awake during the flight according to the local time of your arrival to help minimize jet lag.

Tips to find the cheapest flights to Castro Valley

The cheapest day to fly

Get started finding a cheap flight to Castro Valley on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

The cheapest month to fly

January is the cheapest month to fly to Castro Valley. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to Castro Valley. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to Castro Valley, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to Castro Valley

The lowest price for round-trip flights to Castro Valley in 2026 starts from $47, while one-way tickets start from from $23. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to Castro Valley. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to Castro Valley

Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta are just some of the airlines that can typically offer cheap tickets to Castro Valley. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to Castro Valley and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for Castro Valley, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to Castro Valley. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your Castro Valley plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to Castro Valley

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to Castro Valley.

Stopover savings

The cheapest tickets to Castro Valley are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to Castro Valley. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to Castro Valley for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to Castro Valley. Simply download the free Expedia app to your smart device and activate Castro Valley flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to Castro Valley. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.