Cheap Flights from San Diego (SAN) to Union Island (UNI)

Popular airlines from San Diego Intl. Airport (SAN) to Union Island (UNI)

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Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Union Island (UNI) cost?
Grab a cheap one-way flight or cheap return flight from San Diego Intl. Airport (SAN) to Union Island (UNI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Union Island (UNI)?
The cheapest month to fly from SAN to UNI is , when demand is low. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Union Island (UNI)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SAN to UNI. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from San Diego Intl. Airport (SAN) to Union Island (UNI)?
You'll need to catch a flight with a layover if you're traveling from San Diego Intl. Airport (SAN) to Union Island (UNI). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from SAN to UNI?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be 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 San Diego Intl. Airport (SAN) to Union Island (UNI)?
To reach Union Island (UNI) without delays, opt for a flight that leaves from San Diego Intl. Airport (SAN) 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 San Diego Intl. Airport (SAN) to Union Island (UNI) last-minute?
Holding off until just before your trip to book a ticket from SAN to UNI often results in higher prices. Although you may find some last-minute discounts, they aren't always guaranteed. Keep your travel schedule open for a better chance of scoring a bargain.
Is it cheaper to book a SAN to UNI flight and hotel package?
Booking a SAN to UNI flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our impressive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Union Island (UNI)?
Usually, it's possible to reschedule or cancel your SAN to UNI flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
San Diego Intl.
Destination airport
Union Island
Distance
3770 mi

Book with confidence

Book with confidence

San Diego to Union Island Flights

The cheapest times to fly from San Diego to Union Island

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 San Diego to Union Island are during the month of . You can find some of the cheapest flights from San Diego to Union Island with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Diego to Union Island

Sunday is one of the best days to book for cheap flights from San Diego to Union Island: 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 San Diego to Union Island

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 San Diego to Union Island 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 San Diego to Union Island 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 San Diego to Union Island 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.

 

San Diego to Union Island Flights

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