Best Flights starting from $407
from$407economy
Washington, D.C. (IAD)
Tue, Dec 22
Roundtrip
San Diego (SAN)
Wed, Jan 6
from$418economy
Washington, D.C. (IAD)
Wed, Dec 16
Roundtrip
San Diego (SAN)
Thu, Dec 31
from$427economy
Washington, D.C. (IAD)
Sat, Dec 19
Roundtrip
San Diego (SAN)
Sun, Jan 3
from$427economy
Washington, D.C. (IAD)
Mon, Dec 21
Roundtrip
San Diego (SAN)
Tue, Jan 5
from$448economy
Washington, D.C. (IAD)
Sun, Dec 20
Roundtrip
San Diego (SAN)
Mon, Jan 4
from$455economy
Washington, D.C. (IAD)
Thu, Dec 17
Roundtrip
San Diego (SAN)
Fri, Jan 1
from$749economy
Washington, D.C. (IAD)
Fri, Dec 18
Roundtrip
San Diego (SAN)
Sat, Jan 2
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Other Destinations
Washington, D.C. (IAD) to Dallas (DFW) in December from $197
From $197
Washington, D.C. (IAD) to San Juan (Any) in December from $233
From $233
Washington, D.C. (IAD) to Las Vegas (LAS) in December from $340
From $340
Washington, D.C. (IAD) to Saint Thomas Cyril E King (STT) in December from $425
From $425
Washington, D.C. (IAD) to Kathmandu (KTM) in December from $452
From $452
Washington, D.C. (IAD) to Mexico City (Any) in December from $523
From $523
Flights from Other Cities
Phoenix (PHX) to San Diego (SAN) in December from $78
From $78
Tulsa (TUL) to San Diego (SAN) in December from $126
From $126
Dallas (DFW) to San Diego (SAN) in December from $136
From $136
Tulsa (TUL) to San Diego (SAN) in December from $138
From $138
Boston (BOS) to San Diego (SAN) in December from $168
From $168
Charleston (CHS) to San Diego (SAN) in December from $204
From $204
✈️ Flight Guide: Washington, D.C. (IAD) → San Diego (SAN)
Complete travel information for your December journey
December departures from Washington Dulles International Airport (IAD) to San Diego International Airport (SAN) combine winter weather considerations at the origin with sunny, mild conditions on arrival. Travelers frequently book for winter escapes, holiday visits, and business trips connecting to San Diego, La Jolla, Coronado, and Tijuana. Expect higher fares around mid-December to early January; plan and book in advance for the best pricing.
Departing from Washington, D.C. (IAD) FAQs
During December holiday travel, plan to arrive at Washington Dulles International Airport (IAD) at least 2.5–3 hours before a domestic flight to San Diego International Airport (SAN). Security lines and traffic can be heavier in early December weekends and the weeks around Christmas and New Year's, so give extra time for parking, shuttle transfer from remote lots, and unexpected weather delays. Use TSA PreCheck if available to speed up screening and consider mobile check-in and curbside drop-off for checked bags.
December can bring snow, freezing rain, and icy conditions to the Washington, D.C. metro area, which occasionally cause delays at Washington Dulles International Airport (IAD). Airlines and airport operations typically have de-icing and contingency plans, but storms can still affect departures and connections; check real-time flight status and sign up for airline alerts. If traveling on peak storm days, allow a flexible itinerary or book earlier flights to reduce ripple effects from cancellations.
Washington Dulles International Airport (IAD) offers short-term, daily, and economy parking; the garage and daily lots are the most convenient but fill quickly during December holidays. For long stays, reserve economy parking in advance or use off-site park-and-ride services with shuttle transfers to avoid last-minute availability issues. Always compare pre-book rates and check shuttle frequency during holiday schedules.
United Airlines typically offers nonstop service between Washington Dulles International Airport (IAD) and San Diego International Airport (SAN), with seasonal adjustments in December. Other carriers sometimes provide one-stop itineraries via hubs like Chicago (ORD), Newark (EWR), or Charlotte (CLT). Check airline schedules for the December travel window and filter for 'nonstop' when booking to confirm current nonstop availability.
From downtown Washington, D.C. and nearby cities like Arlington and Baltimore, travelers can use the Silver Line Metrorail extension to get close to Washington Dulles International Airport (IAD) plus Metrobus, commuter shuttles, and private coach services. In December, check service notices for holiday schedule changes and plan extra travel time for road congestion. Rideshare and airport shuttles remain reliable options during peak holiday hours.
During December, many airlines increase staffing and open additional customer service desks at Washington Dulles International Airport (IAD) to handle holiday traffic; lounge access for premium passengers remains the same but can be crowded during peak times. Consider priority boarding and checked-bag tags, enroll in elite programs or credit-card benefits, and use curbside services if available to streamline the holiday travel experience.
Arriving at San Diego International Airport (SAN) in December means trading winter cold for mild coastal weather, holiday lights, and outdoor attractions. Travelers from Washington Dulles International Airport (IAD) find San Diego ideal for family holidays, winter getaways, and business trips that combine pleasant climate with festive events.
Arriving at San Diego (SAN) FAQs
San Diego International Airport (SAN) in December generally offers mild, pleasant weather with average daytime highs in the mid-60s°F (around 18°C) and cooler evenings. Rain is possible but usually limited to a few wet days across the month, making December a popular time to escape winter weather in the D.C. area. Pack light layers and a compact umbrella for occasional showers while enjoying comfortable coastal temperatures.
San Diego International Airport (SAN) offers multiple ground-transport options year-round: taxis, rideshare services, local MTS bus routes, shuttle services, and rental cars. For destinations like downtown San Diego, La Jolla, and Coronado, rideshare or taxi is often the fastest, while rental cars provide flexibility for exploring San Diego County. Holiday traffic in December can slightly increase travel time, so allow extra time for airport pickup or hotel check-ins.
Yes—San Diego hosts signature December events close to San Diego International Airport (SAN), including Balboa Park December Nights (early December), the San Diego Bay Parade of Lights, and local holiday markets in downtown and La Jolla. These seasonal festivals and light displays make San Diego an attractive December leisure destination and are convenient to reach from SAN for visitors looking to combine beach time with holiday festivities.
Baggage claim at San Diego International Airport (SAN) can see increased traffic during December, especially on weekends and the weeks around Christmas and New Year's. Airlines often add extra staff, but expect potential waits and heavier carousel loads; use baggage tracking tools from airlines and consider carry-on only if you have tight connections or a short transfer time.
Nonstop flights between Washington Dulles International Airport (IAD) and San Diego International Airport (SAN) are typically available, primarily on United Airlines, though schedules can vary in December. If nonstop options are limited on your travel dates, consider one-stop connections via Phoenix (PHX), Chicago (ORD), or Denver (DEN) to maintain competitive pricing and reasonable travel time.
After landing at San Diego International Airport (SAN), travelers often visit downtown San Diego's Gaslamp Quarter, Balboa Park, La Jolla Cove, Coronado Island, and nearby Tijuana for excursions. December is ideal for coastal walking, holiday markets, and whale-watching excursions that begin in nearby harbors. Book popular attractions and restaurants ahead during the holiday season to secure reservations.
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December Events for IAD to SAN Travelers — Holiday Festivals & Planning
December is a festive month for both origin and destination. Near Washington Dulles International Airport (IAD), travelers can time departures to coincide with the National Christmas Tree lighting in Washington, D.C., and seasonal markets in the Capital Region. Near San Diego International Airport (SAN), highlight events include Balboa Park December Nights (first weekend of December), the San Diego Bay Parade of Lights (mid-December), holiday performances at local theaters, and seasonal markets in La Jolla and Coronado. These events attract visitors and can influence flight and hotel availability.
Best Time to Fly IAD to SAN in December — Save Money & Avoid Delays
The best time to fly from Washington Dulles International Airport (IAD) to San Diego International Airport (SAN) in December depends on your priorities. For lower fares and fewer crowds, aim for midweek travel in early December. For the best weather and holiday programming in San Diego, travel in early-to-mid December to enjoy events like Balboa Park December Nights without the peak Christmas-week pricing. If avoiding weather delays at the origin is a priority, pick morning nonstops and avoid evenings during forecasted storms.
Direct vs Connecting Flights for IAD to SAN in December — Pros & Cons
Choosing between direct and connecting flights for the IAD–SAN December route balances convenience and price. Nonstop flights from Washington Dulles International Airport (IAD) to San Diego International Airport (SAN) save time (about 5.5–6 hours) and minimize connection risk—valuable during winter travel. Connecting itineraries via hubs such as Phoenix (PHX), Denver (DEN), Chicago (ORD), or Newark (EWR) can lower fares and increase schedule flexibility but add potential layover delays.
Airline Comparison for IAD to SAN — December Options & Recommendations
Key carriers on the IAD–SAN route in December include United Airlines (often providing nonstop service), Alaska Airlines (connecting via west-coast hubs), and American Airlines (one-stop via Charlotte or Dallas). United tends to offer consistent nonstop schedules and robust loyalty benefits for elite flyers; Alaska provides strong West Coast service and customer satisfaction; American and Delta provide competitive connecting itineraries through their hubs. Evaluate ticket flexibility, baggage fees, seat selection policies, and alliance partnerships when comparing fares.
December Seasonal Travel Tips for IAD → SAN — Packing, Security & Weather
Seasonal travel between Washington Dulles International Airport (IAD) and San Diego International Airport (SAN) in December benefits from proactive planning. Pack for both climates—heavy coat for Washington, layered attire for San Diego, and a compact umbrella. Reserve airport parking and rental cars in advance, enroll in TSA PreCheck or CLEAR to expedite security at IAD, and select morning nonstops where possible to reduce weather-related risk. For holiday events at SAN, pre-book tours and restaurants and allow extra time for baggage claim and rideshare waits.
IAD to SAN Flight Time & December Schedules — Nonstop and Connecting Options
Typical nonstop flight time from Washington Dulles International Airport (IAD) to San Diego International Airport (SAN) ranges from about 5 hours 30 minutes to 6 hours depending on winds and routing. In December, daytime schedules are common with early morning departures and late-afternoon returns; holiday weeks may have additional flights and capacity adjustments. If nonstop options are unavailable, one-stop itineraries via hubs like Phoenix (PHX), Denver (DEN), or Chicago (ORD) add 1–3 hours of travel time plus layovers.
Cheap Flights IAD to SAN in December — Save on Holiday Airfare
Finding cheap flights from Washington Dulles International Airport (IAD) to San Diego International Airport (SAN) in December requires timing, flexibility, and use of search tools. Target mid-week departures (Tuesday–Thursday) and travel in the first two weeks of December to avoid peak holiday premiums. Consider one-stop itineraries via hubs like Phoenix (PHX), Denver (DEN), or Chicago (ORD) to shave costs, and set fare alerts with multiple low-cost airlines and legacy carriers. Use flexible-date calendars, clear cookies or use incognito mode for searching, and sign up for airline mailing lists for flash sales.
Tips
- Book 3–8 weeks in advance for non-peak December travel; earlier for peak holiday dates.
- Compare nonstop vs one-stop options—nonstops are faster but sometimes costlier around Christmas.
- Use flexible airports and dates: search nearby airports and +/-3 day windows for savings.
- Leverage reward points and airline credit-card companion fares where possible.