$66+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ILG
Mar 8 — Mar 151
1 adult, Economy
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Find cheap flights from St. Louis to Delaware with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Delaware
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Cheapest flights from St. Louis to DelawareExplore 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 February 6, 2026.
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 February 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Fri 3/65:05 am
PHL
- STL
1 stop7h 44m
Frontier
Deal found 2/3![Frontier logo]()
$147
This Flightnetwork deal was found by Cheapflights users on 2/3. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Tue 3/105:55 pm
PHL
- STL
1 stop6h 24m
Frontier
Deal found 2/3![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:17 pm
STL
- PHL
1 stop13h 10m
Frontier
Fri 3/65:05 am
PHL
- STL
1 stop7h 44m
Frontier
Deal found 2/4![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:09 pm
STL
- PHL
1 stop9h 43m
Frontier
Mon 3/237:10 pm
PHL
- STL
1 stop16h 22m
Frontier
Deal found 2/2![Frontier logo]()
$158
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:13 pm
STL
- PHL
1 stop10h 57m
Frontier
Tue 5/195:29 pm
PHL
- STL
1 stop6h 50m
Frontier
Deal found 2/3![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 2/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:49 pm
STL
- PHL
1 stop21h 55m
Frontier
Wed 3/43:45 pm
PHL
- STL
1 stop7h 42m
Frontier
Deal found 2/5![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:51 pm
STL
- PHL
1 stop18h 35m
Frontier
Mon 3/237:10 pm
PHL
- STL
1 stop16h 22m
Frontier
Deal found 2/2![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2411:27 am
STL
- PHL
1 stop12h 25m
Frontier
Wed 4/17:10 pm
PHL
- STL
1 stop16h 20m
Frontier
Deal found 2/2![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Wed 4/155:29 pm
PHL
- STL
1 stop6h 50m
Frontier
Deal found 2/3![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:32 am
STL
- PHL
2 stops11h 18m
Multiple Airlines
Wed 3/185:05 am
PHL
- STL
1 stop6h 32m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2312:16 pm
STL
- PHL
1 stop11h 36m
Frontier
Sun 4/55:01 am
PHL
- STL
1 stop6h 29m
Frontier
Deal found 2/3![Frontier logo]()
$185
This American Airlines deal was found by Cheapflights users on 2/5. 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.
Fri 6/195:46 pm
STL
- SBY
1 stop4h 14m
American Airlines
Mon 6/226:41 am
SBY
- STL
1 stop4h 58m
American Airlines
Deal found 2/5![American Airlines logo]()
$518
Best flights from St. Louis to DelawareDiscover carefully curated flight deals from St. Louis to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.
Discover carefully curated flight deals from St. Louis to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:54 pm
STL
- PHL
1 stop7h 31m
Frontier
Wed 4/158:25 pm
PHL
- STL
1 stop23h 47m
Frontier
Deal found 2/3![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2012:16 pm
STL
- PHL
1 stop11h 36m
Multiple Airlines
Sun 3/226:08 pm
PHL
- STL
2 stops20h 26m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 2/3. 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.
Wed 4/223:55 pm
STL
- PHL
1 stop7h 00m
Southwest
Wed 5/136:35 pm
PHL
- STL
Nonstop2h 25m
Southwest
Deal found 2/3![Southwest logo]()
$327
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 4/131:29 pm
STL
- PHL
Nonstop2h 20m
American Airlines
Wed 4/151:47 pm
PHL
- STL
1 stop5h 17m
American Airlines
Deal found 2/3![American Airlines logo]()
$348
This Travelocity deal was found by Cheapflights users on 2/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:13 pm
STL
- PHL
1 stop10h 57m
Frontier
Mon 4/2010:38 pm
PHL
- STL
1 stop25h 41m
Frontier
Deal found 2/4![Frontier logo]()
$195
This Expedia deal was found by Cheapflights users on 2/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:49 pm
STL
- PHL
1 stop14h 43m
Frontier
Sun 2/2210:59 pm
PHL
- STL
1 stop26h 00m
Frontier
Deal found 2/5![Frontier logo]()
$195
This CheapOair deal was found by Cheapflights users on 2/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:51 pm
STL
- PHL
1 stop22h 46m
Frontier
Mon 3/1612:06 pm
PHL
- STL
1 stop12h 13m
Frontier
Deal found 2/5![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 2/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/183:49 pm
STL
- PHL
1 stop29h 04m
Frontier
Sun 2/225:42 pm
PHL
- STL
1 stop20h 27m
Frontier
Deal found 2/4![Frontier logo]()
$227
This Southwest deal was found by Cheapflights users on 2/3. 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.
Thu 4/231:35 pm
STL
- PHL
Nonstop2h 10m
Southwest
Wed 4/296:35 pm
PHL
- STL
Nonstop2h 25m
Southwest
Deal found 2/3![Southwest logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1312:16 pm
STL
- PHL
1 stop11h 36m
Frontier
Tue 3/244:10 pm
PHL
- STL
1 stop8h 09m
Frontier
Deal found 2/2![Frontier logo]()
$298
This American Airlines deal was found by Cheapflights users on 2/5. 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.
Fri 6/195:46 pm
STL
- SBY
1 stop4h 14m
American Airlines
Mon 6/226:41 am
SBY
- STL
1 stop4h 58m
American Airlines
Deal found 2/5![American Airlines logo]()
$518
This CheapOair deal was found by Cheapflights users on 2/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:49 pm
STL
- PHL
1 stop26h 32m
Frontier
Sun 3/810:38 pm
PHL
- STL
1 stop9h 24m
Frontier
Deal found 2/4![Frontier logo]()
$330
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Fri 2/207:05 am
STL
- SBY
1 stop5h 20m
American Airlines
Sun 2/227:18 am
SBY
- STL
1 stop6h 15m
American Airlines
Deal found 2/3![American Airlines logo]()
$596
Last-minute flights from St. Louis to DelawareDiscover last-minute flight deals from St. Louis to Delaware. Data last updated February 6, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Delaware. Data last updated February 6, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Fri 2/207:05 am
STL
- SBY
1 stop5h 20m
American Airlines
Sun 2/227:18 am
SBY
- STL
1 stop6h 15m
American Airlines
Deal found 2/3![American Airlines logo]()
$596
This Expedia deal was found by Cheapflights users on 2/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Wed 2/251:35 pm
PHL
- STL
1 stop9h 52m
Frontier
Deal found 2/5![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 2/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:49 pm
STL
- PHL
1 stop21h 55m
Frontier
Wed 3/43:45 pm
PHL
- STL
1 stop7h 42m
Frontier
Deal found 2/5![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Fri 3/65:05 am
PHL
- STL
1 stop7h 44m
Frontier
Deal found 2/3![Frontier logo]()
$147
This Flightnetwork deal was found by Cheapflights users on 2/3. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop19h 33m
Frontier
Tue 3/105:55 pm
PHL
- STL
1 stop6h 24m
Frontier
Deal found 2/3![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:17 pm
STL
- PHL
1 stop13h 10m
Frontier
Fri 3/65:05 am
PHL
- STL
1 stop7h 44m
Frontier
Deal found 2/4![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:09 pm
STL
- PHL
1 stop9h 43m
Frontier
Mon 3/237:10 pm
PHL
- STL
1 stop16h 22m
Frontier
Deal found 2/2![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:51 pm
STL
- PHL
1 stop18h 35m
Frontier
Mon 3/237:10 pm
PHL
- STL
1 stop16h 22m
Frontier
Deal found 2/2![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:32 am
STL
- PHL
2 stops11h 18m
Multiple Airlines
Wed 3/185:05 am
PHL
- STL
1 stop6h 32m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2312:16 pm
STL
- PHL
1 stop11h 36m
Frontier
Sun 4/55:01 am
PHL
- STL
1 stop6h 29m
Frontier
Deal found 2/3![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 2/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/238:12 pm
STL
- PHL
1 stop8h 19m
Frontier
Tue 4/78:25 pm
PHL
- STL
1 stop14h 23m
Frontier
Deal found 2/2![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2411:27 am
STL
- PHL
1 stop12h 25m
Frontier
Wed 4/17:10 pm
PHL
- STL
1 stop16h 20m
Frontier
Deal found 2/2![Frontier logo]()
$180
One-way flights from St. Louis to DelawareSearch for one-way flight options from St. Louis to Delaware. Find affordable one-way fares based on user searches. Data last updated February 6, 2026.
Search for one-way flight options from St. Louis to Delaware. Find affordable one-way fares based on user searches. Data last updated February 6, 2026.
This Trip.com deal was found by Cheapflights users on 2/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/33:49 pm
STL
- PHL
1 stop21h 51m
Frontier
Deal found 2/4![Frontier logo]()
$66
This Trip.com deal was found by Cheapflights users on 2/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/28:22 pm
STL
- PHL
1 stop13h 05m
Frontier
Deal found 2/3![Frontier logo]()
$73
This Trip.com deal was found by Cheapflights users on 2/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:17 pm
STL
- PHL
1 stop20h 54m
Frontier
Deal found 2/5![Frontier logo]()
$74
This Trip.com deal was found by Cheapflights users on 2/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/61:09 pm
STL
- PHL
1 stop10h 43m
Frontier
Deal found 2/5![Frontier logo]()
$78
This Priceline deal was found by Cheapflights users on 2/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:12 pm
STL
- PHL
1 stop8h 22m
Frontier
Deal found 2/3![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 2/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:49 pm
STL
- PHL
1 stop14h 43m
Frontier
Deal found 2/5![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/28:22 pm
STL
- PHL
2 stops19h 04m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:27 am
STL
- PHL
1 stop9h 41m
Frontier
Deal found 2/3![Frontier logo]()
$85
This Frontier deal was found by Cheapflights users on 2/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/68:13 pm
STL
- PHL
1 stop10h 57m
Frontier
Deal found 2/4![Frontier logo]()
$86
This American Airlines deal was found by Cheapflights users on 2/5. 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.
Sat 4/187:00 am
STL
- SBY
1 stop5h 21m
American Airlines
Deal found 2/5![American Airlines logo]()
$285
Find 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 February 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $147 (Kiwi.com) |
One-way from | $66 (Trip.com) |
Popular in | November |
Cheapest in | August |
Average price | $443 |
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 February 6, 2026.
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
Mon 4/13
4:54 pm-1:25 am
1 stop7h 31m
Philadelphia
Wed 4/15
8:25 pm-7:12 pm
1 stop23h 47m
$160
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 4/17
8:13 pm-8:10 am
1 stop10h 57m
Philadelphia
Mon 4/20
10:38 pm-11:19 pm
1 stop25h 41m
$195
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Thu 2/19
3:49 pm-7:32 am
1 stop14h 43m
Philadelphia
Sun 2/22
10:59 pm-11:59 pm
1 stop26h 00m
$195
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 2/25
4:51 pm-4:37 pm
1 stop22h 46m
Philadelphia
Mon 3/16
12:06 pm-11:19 pm
1 stop12h 13m
$221
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 2/18
3:49 pm-9:53 pm
1 stop29h 04m
Philadelphia
Sun 2/22
5:42 pm-1:09 pm
1 stop20h 27m
$227
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 3/20
12:16 pm-12:52 am
1 stop11h 36m
Philadelphia
Sun 3/22
6:08 pm-1:34 pm
2 stops20h 26m
$281
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 3/13
12:16 pm-12:52 am
1 stop11h 36m
Philadelphia
Tue 3/24
4:10 pm-11:19 pm
1 stop8h 09m
$298
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 4/22
3:55 pm-11:55 pm
1 stop7h 00m
Philadelphia
Wed 5/13
6:35 pm-8:00 pm
Nonstop2h 25m
$327
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Thu 3/5
3:49 pm-7:21 pm
1 stop26h 32m
Philadelphia
Sun 3/8
10:38 pm-7:02 am
1 stop9h 24m
$330
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Thu 4/23
1:35 pm-4:45 pm
Nonstop2h 10m
Philadelphia
Wed 4/29
6:35 pm-8:00 pm
Nonstop2h 25m
$338
Showing 1-10 of 26 results
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STL-PHL
STL-SBY
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STL-USDE
STL-PHL
STL-SBY
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