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Cheap flights from Appleton to San Diego International

Compare Appleton to San Diego International flight deals

Find the cheapest month or even day of the year to fly to San Diego International

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Flight deals from Appleton to San Diego International

Looking for a cheap last-minute deal or the best round-trip flight from Appleton Airport to San Diego International Airport? If you want to travel next month, round-trip fares start from $321. Find the lowest prices on one-way and round-trip tickets right here.
San Diego.$289 per passenger.Departing Sun, Oct 25, returning Thu, Oct 29.Round-trip flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departing from Appleton on Sun, Oct 25, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departing from San Diego International on Thu, Oct 29, arriving in Appleton.Price includes taxes and charges.From $289, select.
San Diego.$321 per passenger.Departing Thu, Sep 10, returning Wed, Sep 16.Round-trip flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departing from Appleton on Thu, Sep 10, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departing from San Diego International on Wed, Sep 16, arriving in Appleton.Price includes taxes and charges.From $321, select.
San Diego.$322 per passenger.Departing Tue, Jan 12, returning Tue, Jan 19.Round-trip flight with United.Outbound indirect flight with United, departing from Appleton on Tue, Jan 12, arriving in San Diego International.Inbound indirect flight with United, departing from San Diego International on Tue, Jan 19, arriving in Appleton.Price includes taxes and charges.From $322, select.
San Diego.$341 per passenger.Departing Wed, Oct 28, returning Sun, Nov 1.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Appleton on Wed, Oct 28, arriving in San Diego International.Inbound indirect flight with Delta, departing from San Diego International on Sun, Nov 1, arriving in Appleton.Price includes taxes and charges.From $341, select.
San Diego.$341 per passenger.Departing Sun, Aug 30, returning Sat, Sep 12.Round-trip flight with United.Outbound indirect flight with United, departing from Appleton on Sun, Aug 30, arriving in San Diego International.Inbound indirect flight with United, departing from San Diego International on Sat, Sep 12, arriving in Appleton.Price includes taxes and charges.From $341, select.
San Diego.$359 per passenger.Departing Thu, Dec 3, returning Sun, Dec 6.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Appleton on Thu, Dec 3, arriving in San Diego International.Inbound indirect flight with Delta, departing from San Diego International on Sun, Dec 6, arriving in Appleton.Price includes taxes and charges.From $359, select.
San Diego.$392 per passenger.Departing Wed, May 12, returning Mon, May 17.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Appleton on Wed, May 12, arriving in San Diego International.Inbound indirect flight with Delta, departing from San Diego International on Mon, May 17, arriving in Appleton.Price includes taxes and charges.From $392, select.
San Diego.$426 per passenger.Departing Tue, Aug 25, returning Sat, Aug 29.Round-trip flight with United.Outbound indirect flight with United, departing from Appleton on Tue, Aug 25, arriving in San Diego International.Inbound indirect flight with United, departing from San Diego International on Sat, Aug 29, arriving in Appleton.Price includes taxes and charges.From $426, select.
San Diego.$1,160 per passenger.Departing Fri, Mar 19, returning Wed, Mar 24.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Appleton on Fri, Mar 19, arriving in San Diego International.Inbound indirect flight with Delta, departing from San Diego International on Wed, Mar 24, arriving in Appleton.Price includes taxes and charges.From $1,160, select.

Find the cheapest month to fly from Appleton to San Diego International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Appleton to San Diego International flights are currently cheapest in October.
Aug
from $426
Sep
from $321
Oct
from $289
Nov
Find prices
Dec
from $359
Jan
from $322
Feb
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Mar
from $1,160
Apr
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May
from $392
Jun
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Jul
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Appleton to San Diego International: Alternative routes

Compare routes from Appleton to San Diego below. You may find an airport to fly into that's cheaper, faster, or easier than San Diego International.

San Diego International

4km from central San Diego
ClosestCheapest
from $289
Search flights

McClellan – Palomar

48km from central San Diego
from $364
Search flights

Appleton to San Diego: Flight information

The things to know before you go.
Cheapest flight found$289
Cheapest month to flyOctober

Finding cheap flights from Appleton to San Diego International: Frequently asked questions

The best price we found for a round-trip flight from Appleton to San Diego International is $289. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Appleton to San Diego International. But we found flights with one or more stops from $289.
There are no flights flying from Appleton to San Diego International, as of August 2026.
The cheapest month to fly from Appleton to San Diego International is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Appleton Airport to San Diego International Airport on Sunday, October 25, 2026.
No airlines currently offer direct flights between Appleton Airport and San Diego International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Allegiant Air offers the cheapest flight tickets to San Diego International.

Traveling from Appleton Airport (ATW) to San Diego International Airport (SAN): what you need to know

  • The timezone in San Diego is UTC-8, which is two hours behind Appleton.

  • Leave enough time to catch your ATW to SAN flight. A good rule of thumb is to arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Traveling during a peak month such as June? Public holidays and other popular seasons can mean longer lines and delays at security. Play it safe and get there up to four hours before an international flight and two hours before a domestic departure.

  • If you'd like to add a stop to your trip, simply uncheck 'Direct flights only' when searching for your ticket from Appleton Airport to San Diego International Airport. These are the top stopovers between ATW and SAN:

    • Chicago O'Hare International Airport

    • Denver International Airport

    • Minneapolis St Paul Airport

Handy information about Appleton Airport (ATW)

  • ATW's address is West 6390, Challenger Drive, Suite 201.

  • When it comes to the on-time performance of Appleton Airport, data shows 70% of flights arrive within the expected timeframe.

  • To get to Appleton Airport from central Appleton, it'll take around 15 minutes if you're traveling by car. This depends on traffic though. It's approximately 11 kilometers from the airport to the city center.

  • The journey when using public transport typically takes 45 minutes.

  • Booked an early flight from Appleton Airport to San Diego International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra snooze time) by picking one of these stays close to ATW:

Arriving at San Diego International Airport (SAN)

Getting from San Diego International Airport (SAN) to central San Diego

  • SAN is located at N Harbor Dr.

  • San Diego International Airport to the center of San Diego has a drive time of about 15 minutes. It's approximately 5 kilometers away.

  • It typically takes 25 minutes to get there by public transport.

When to fly to San Diego International Airport (SAN)

  • It's time to work out your trip dates for your flight from Appleton Airport to San Diego International Airport. August is the busiest month to head to San Diego. If you like a more relaxed vibe, go in March.

  • Lock in your flight from Appleton Airport to San Diego International Airport for August if you'd like to explore San Diego during its warmest month. Expect temperatures of between 16ºC (61ºF) and 27ºC (81ºF).

  • Search for cheap tickets from ATW to SAN in February if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between 8ºC (46ºF) and 22ºC (72ºF) on average.

Explore more of the United States

  • Los Angeles is just one of the many cities in the United States waiting to be discovered after you've experienced San Diego. Around 177 kilometers away to the north-west, its best attractions include Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • Phoenix is another essential stop in the United States and is around 483 kilometers east of San Diego. No trip is complete without seeing Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum.

More travel options

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.