What are the cheapest airlines to fly from Washington, D.C. to Carlsbad one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $72. Users have also found prices from $118 and $119 on Southwest and JetBlue, respectively.

Weekly flight availability from Washington, D.C. to Carlsbad

The most flights from WAS to C4D are scheduled on a Friday (44 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

In terms of precipitation, rainfall in Carlsbad ranges from 0.0 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit Carlsbad when rainfall is around 0.0 in.

If weather is an important factor for your trip to Carlsbad, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

What are the most popular routes from Washington, D.C. to Carlsbad?

When deciding which route to take from Washington, D.C. to Carlsbad consider Washington, D.C. Reagan-National - Los Angeles, Baltimore/Washington - Los Angeles or Washington, D.C. Dulles Intl - Los Angeles as they are the most popular.

What are the cheapest flights from Washington, D.C. to Carlsbad?

The cheapest flight price from Washington, D.C. to Carlsbad is $168. On average you can expect to pay $1,330. The most popular route, (Washington, D.C. Reagan-National - Los Angeles), can usually be booked for $206.

What are the most reliable airlines from Washington, D.C. to Carlsbad?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. to Carlsbad on time: Ethiopian Air (98%), Egyptair (94%), Air China (84%).

What are the most popular airlines that fly from Washington, D.C. to Carlsbad?

When booking a flight from Washington, D.C. to Carlsbad, you may want to consider flying on United Airlines, American Airlines or Alaska Airlines as they are the most popular for this route.

Can I find deals for flights from Washington, D.C. to Carlsbad that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Carlsbad flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Carlsbad?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Carlsbad.

Can I find deals for business class flights from Washington, D.C. to Carlsbad?

Yes. Cheapflights offers flight deals from Washington, D.C. to Carlsbad by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Find Cheap Flights from Washington, D.C. to Carlsbad, CA

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Cheapflights Tip: The best prices from Washington, D.C. to Carlsbad are usually found in January or October, booked 71 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Find flight deals from Washington, D.C. to Carlsbad

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	January
Average price	$367

Provider with most accurate pricing for Washington, D.C. (WAS)-Los Angeles flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Los Angeles flights.

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Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Carlsbad

Prices

Airlines

What is the cheapest time of day to fly from WAS to C4D?

It’s typically best to fly out from Washington, D.C. to Carlsbad in the evening. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to Carlsbad?

Travelers seeking maximum savings on their Washington, D.C. to Carlsbad flight should consider departing on Saturday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Carlsbad

Read reviews from past customers who have flown Southwest,Alaska Airlines, andUnited Airlines from Washington, D.C. to Carlsbad. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Southwest

8.0

Very good

4,213 reviews

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Alaska Airlines

7.9

Good

13,016 reviews

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

United Airlines

7.4

Good

10,279 reviews

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

American Airlines

7.0

Good

12,127 reviews

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Frontier

5.5

Fair

2,553 reviews

Southwest

8.0

Very good

4,213 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. to Carlsbad one-way?
For one-way options, check prices for Frontier. According to our data, you can fly for as low as $72. Users have also found prices from $118 and $119 on Southwest and JetBlue, respectively.
What are the most popular routes from Washington, D.C. to Carlsbad?
When deciding which route to take from Washington, D.C. to Carlsbad consider Washington, D.C. Reagan-National - Los Angeles, Baltimore/Washington - Los Angeles or Washington, D.C. Dulles Intl - Los Angeles as they are the most popular.
What are the most reliable airlines from Washington, D.C. to Carlsbad?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. to Carlsbad on time: Ethiopian Air (98%), Egyptair (94%), Air China (84%).
What are the cheapest flights from Washington, D.C. to Carlsbad?
The cheapest flight price from Washington, D.C. to Carlsbad is $168. On average you can expect to pay $1,330. The most popular route, (Washington, D.C. Reagan-National - Los Angeles), can usually be booked for $206.
Can I find deals for flights from Washington, D.C. to Carlsbad that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Carlsbad flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Carlsbad?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Carlsbad.
Can I find deals for business class flights from Washington, D.C. to Carlsbad?
Yes. Cheapflights offers flight deals from Washington, D.C. to Carlsbad by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top 7 airlines flying from Washington, D.C. to Carlsbad

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$109	Average$326	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$131	Average$472	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$186	Average$502	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$186	Average$455	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$199	Average$477	FlexibilityNo cancel fee	On-time69%
JetBlue	Cheapest$225	Average$400	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$236	Average$453	FlexibilityNo cancel fee	On-time63%

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Cheap flights from Washington, D.C. (WAS) to Carlsbad, CA, CA

Find cheap flights from Washington, D.C. to Carlsbad with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Washington, D.C. to Carlsbad

Most accurate provider

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Popular in

Cheapest in

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Cheapflights Insights

What is the cheapest time of day to fly from WAS to C4D?

It’s typically best to fly out from Washington, D.C. to Carlsbad in the evening. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to Carlsbad?

Travelers seeking maximum savings on their Washington, D.C. to Carlsbad flight should consider departing on Saturday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. to Carlsbad

The most flights from WAS to C4D are scheduled on a Friday (44 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

Reviews of airlines servicing Carlsbad

Read reviews from past customers who have flown Southwest,Alaska Airlines, andUnited Airlines from Washington, D.C. to Carlsbad. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. to Carlsbad one-way?

What are the most popular routes from Washington, D.C. to Carlsbad?

What are the most reliable airlines from Washington, D.C. to Carlsbad?

What are the cheapest flights from Washington, D.C. to Carlsbad?

Can I find deals for flights from Washington, D.C. to Carlsbad that include hotel bookings?

How can I find direct flights from Washington, D.C. to Carlsbad?

Can I find deals for business class flights from Washington, D.C. to Carlsbad?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Carlsbad

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Carlsbad by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Washington, D.C. to Carlsbad by cabin class

Find flights from Washington, D.C. to Carlsbad, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Washington, D.C. and Carlsbad flights

Browse other Washington, D.C. and Carlsbad flight options. Last updated on October 5, 2026.

Other flights from Washington, D.C.

Browse through other flights departing from Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.

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Top 7 airlines flying from Washington, D.C. to Carlsbad

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