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Delaware

$72+ Cheap flights from St. Louis (STL) to Delaware

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ILG
ago 5 — ago 121
ter 8/5
ter 8/12
1 adult, Economy
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Cheap flight deals from St. Louis to Delaware

Keep the following information in mind while searching for St. Louis to Delaware flight deals. Data was last updated julho 31, 2025.

Round-trip from

$146
(Cheapflightsfares)

One-way from

$72
(Cheapflightsfares)

Popular in

March

Cheapest in

August

Average price

$296
From Lambert-St Louis to Delaware
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One-way flight from Lambert-St Louis to Delaware
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Highest demand for flights based on searches. 12% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from St. Louis to Delaware

Cheapest flights from St. Louis to Delaware
Explore the most affordable flight options available from St. Louis to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julho 31, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 8/222:30 pmSTL - PHL
1 stop5h 19mSpirit Airlines
dom 8/247:00 amPHL - STL
1 stop7h 32mSpirit Airlines
Deal found 7/31$146
This Mytrip deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 8/233:02 pmSTL - PHL
1 stop8h 18mMultiple Airlines
seg 8/257:00 amPHL - STL
1 stop7h 32mMultiple Airlines
Deal found 7/31$194
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 9/46:00 amSTL - PHL
Nonstop2h 18mAmerican Airlines
sáb 9/610:34 amPHL - STL
Nonstop2h 36mAmerican Airlines
Deal found 7/31$217
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 8/167:29 pmSTL - PHL
1 stop8h 40mFrontier
sáb 8/238:02 pmPHL - STL
1 stop18h 05mFrontier
Deal found 7/30$225
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 9/166:25 amSTL - PHL
2 stops8h 35mSouthwest
qua 9/174:45 pmPHL - STL
Nonstop2h 20mSouthwest
Deal found 7/30$232
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 9/43:42 pmSTL - PHL
1 stop5h 38mDelta
seg 9/89:00 amPHL - STL
1 stop6h 37mDelta
Deal found 7/31$237
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 8/136:26 amSTL - SBY
1 stop4h 50mAmerican Airlines
dom 8/176:30 amSBY - STL
1 stop7h 05mAmerican Airlines
Deal found 7/29$484

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julho 31, 2025.
Use the filters below to find and compare flights from St. Louis to Delaware that are best for you.

Fly from

St. Louis

Fly to

Delaware

Route

Depart

Return

Price

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

sex 8/22

2:30 pm-8:49 pm

1 stop5h 19m

Philadelphia

dom 8/24

7:00 am-1:32 pm

1 stop7h 32m

$146

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

sáb 8/23

3:02 pm-12:20 am

1 stop8h 18m

Philadelphia

seg 8/25

7:00 am-1:32 pm

1 stop7h 32m

$194

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

qui 9/4

6:00 am-9:18 am

Nonstop2h 18m

Philadelphia

sáb 9/6

10:34 am-12:10 pm

Nonstop2h 36m

$217

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

sáb 8/16

7:29 pm-5:09 am

1 stop8h 40m

Philadelphia

sáb 8/23

8:02 pm-1:07 pm

1 stop18h 05m

$225

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

ter 9/16

6:25 am-4:00 pm

2 stops8h 35m

Philadelphia

qua 9/17

4:45 pm-6:05 pm

Nonstop2h 20m

$232

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

qui 9/4

3:42 pm-10:20 pm

1 stop5h 38m

Philadelphia

seg 9/8

9:00 am-2:37 pm

1 stop6h 37m

$237

St. LouisSalisbury

STL - SBY

STLSBY

Lambert-St Louis

qua 8/13

6:26 am-12:16 pm

1 stop4h 50m

Salisbury-Ocean City

dom 8/17

6:30 am-12:35 pm

1 stop7h 05m

$484

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

qui 9/11

12:05 pm-9:39 pm

1 stop8h 34m

$72

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

qua 10/29

4:45 pm-8:03 pm

Nonstop2h 18m

$109

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

qua 8/6

7:29 pm-5:09 am

1 stop8h 40m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 14 results
1
2

Best time to book a flight from St. Louis to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Delaware
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated julho 31, 2025.
Read through reviews of airlines operating flights from St. Louis to Delaware, such as Southwest, Delta, and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Delaware?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Delaware from St. Louis.

  • What are the cheapest airlines to fly from St. Louis to Delaware one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $72. Users have also found prices from $109 and $110 on American Airlines and Frontier, respectively.

  • Can I find deals for flights from St. Louis to Delaware that include hotel bookings?

    Yes. In addition to deals on St. Louis to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Delaware.

  • Can I find deals for business class flights from St. Louis to Delaware?

    Yes. Cheapflights offers flight deals from St. Louis to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for St. Louis to Delaware

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