Cheap Flights from Rockford (RFD) to San Diego (SAN)

Featured airlines

American Airlines
United
Southwest Airlines
Delta
Spirit Airlines
JetBlue Airways
Frontier Airlines
Air India
Hawaiian Airlines

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Flights from Rockford (RFD) to San Diego (SAN)
Origin airport
Greater Rockford
Destination airport
San Diego Intl.
Distance
1664 mi

Rockford to San Diego Flights

The cheapest times to fly from Rockford to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Rockford to San Diego are during the month of . You can find some of the cheapest flights from Rockford to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Rockford to San Diego

Sunday is one of the best days to book for cheap flights from Rockford to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Rockford to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Rockford to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Rockford to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Rockford to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

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

 

Frequently asked questions

How much does a flight from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN) cost?
Discover the latest flight deals from RFD to SAN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from RFD to SAN?
The cheapest flights from RFD to SAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from RFD to SAN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from RFD to SAN. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN)?
Direct flights from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and click on either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from RFD to SAN?
You’ll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN)?
To arrive at San Diego Intl. Airport (SAN) without delays, choose a flight that takes off from Rockford, IL (RFD-Greater Rockford) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN) last-minute?
Booking your plane ticket from RFD to SAN just before your trip is typically more expensive. But if there’s some wiggle room with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a RFD to SAN flight and hotel package?
Booking a RFD to SAN flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our impressive range of hotels and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Rockford, IL (RFD-Greater Rockford) to San Diego Intl. Airport (SAN)?
In most instances, you’re able to cancel or reschedule your RFD to SAN flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline’s guidelines and fees on flight changes, or if you’d like further information, head to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.