$138+ Cheap flights from San Luis Obispo (SBP) to Illinois
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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
May 24 — May 311
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Luis Obispo to Illinois 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 San Luis Obispo to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Luis Obispo to IllinoisExplore the most affordable flight options available from San Luis Obispo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
Explore the most affordable flight options available from San Luis Obispo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/302:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 6/39:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$275
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 9/112:29 pm
SBP
- ORD
1 stop9h 29m
American Airlines
Sat 9/55:00 am
ORD
- SBP
2 stops8h 58m
American Airlines
Deal found 4/21![American Airlines logo]()
$280
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$289
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:06 pm
SBP
- ORD
1 stop6h 53m
United Airlines
Sat 7/186:10 pm
ORD
- SBP
1 stop7h 34m
United Airlines
Deal found 4/21![United Airlines logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/309:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Tue 6/29:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/239:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$316
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Wed 7/2212:31 pm
SBP
- ORD
1 stop7h 55m
American Airlines
Wed 7/295:00 am
ORD
- SBP
1 stop8h 51m
American Airlines
Deal found 4/21![American Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/182:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/309:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
SBP
- ORD
1 stop10h 50m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:52 am
SBP
- PIA
2 stops10h 00m
United Airlines
Wed 8/191:21 pm
PIA
- SBP
2 stops10h 47m
United Airlines
Deal found 4/20![United Airlines logo]()
$379
Best flights from San Luis Obispo to IllinoisDiscover carefully curated flight deals from San Luis Obispo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
Discover carefully curated flight deals from San Luis Obispo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
This American Airlines deal was found by Cheapflights users on 4/19. 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.
Tue 9/1512:34 pm
SBP
- ORD
1 stop8h 38m
American Airlines
Tue 10/66:00 am
ORD
- SBP
1 stop7h 45m
American Airlines
Deal found 4/19![American Airlines logo]()
$275
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:06 pm
SBP
- ORD
1 stop6h 53m
United Airlines
Sat 7/186:10 pm
ORD
- SBP
1 stop7h 34m
United Airlines
Deal found 4/21![United Airlines logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Wed 6/39:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$312
This American Airlines deal was found by Cheapflights users on 4/19. 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.
Wed 7/812:31 pm
SBP
- ORD
1 stop7h 55m
American Airlines
Thu 7/165:19 pm
ORD
- SBP
1 stop7h 31m
American Airlines
Deal found 4/19![American Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 6/39:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/262:06 pm
SBP
- ORD
1 stop7h 37m
United Airlines
Thu 7/24:30 pm
ORD
- SBP
1 stop7h 42m
United Airlines
Deal found 4/23![United Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/225:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Mon 6/297:59 pm
ORD
- SBP
1 stop23h 18m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:15 pm
SBP
- ORD
1 stop7h 14m
United Airlines
Sat 5/92:15 pm
ORD
- SBP
1 stop7h 45m
United Airlines
Deal found 4/20![United Airlines logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:04 am
SBP
- ORD
1 stop10h 53m
Alaska Airlines
Mon 7/207:59 pm
ORD
- SBP
1 stop23h 18m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/210:52 am
SBP
- ORD
1 stop8h 32m
United Airlines
Sat 9/51:58 pm
ORD
- SBP
1 stop7h 49m
United Airlines
Deal found 4/19![United Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 4/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:52 am
SBP
- PIA
2 stops11h 30m
United Airlines
Tue 8/258:25 am
PIA
- SBP
2 stops8h 58m
United Airlines
Deal found 4/24![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:04 am
SBP
- ORD
1 stop10h 53m
Alaska Airlines
Thu 7/96:20 am
ORD
- SBP
1 stop12h 57m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:52 am
SBP
- PIA
2 stops10h 00m
United Airlines
Wed 8/191:21 pm
PIA
- SBP
2 stops10h 47m
United Airlines
Deal found 4/19![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/266:04 am
SBP
- ORD
1 stop10h 53m
Alaska Airlines
Fri 7/102:20 pm
ORD
- SBP
1 stop11h 20m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:52 am
SBP
- PIA
2 stops10h 00m
United Airlines
Wed 8/191:21 pm
PIA
- SBP
2 stops10h 47m
United Airlines
Deal found 4/19![United Airlines logo]()
$396
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:28 pm
SBP
- PIA
2 stops11h 24m
United Airlines
Sat 9/51:21 pm
PIA
- SBP
2 stops10h 47m
United Airlines
Deal found 4/21![United Airlines logo]()
$479
Last-minute flights from San Luis Obispo to IllinoisDiscover last-minute flight deals from San Luis Obispo to Illinois. Data last updated April 24, 2026 and is based on user searches.
Discover last-minute flight deals from San Luis Obispo to Illinois. Data last updated April 24, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Tue 4/2812:57 pm
SBP
- ORD
2 stops8h 51m
American Airlines
Tue 5/265:50 pm
ORD
- SBP
1 stop6h 55m
American Airlines
Deal found 4/23![American Airlines logo]()
$346
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/182:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/239:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$289
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:00 am
SBP
- ORD
1 stop6h 15m
United Airlines
Fri 5/293:26 pm
ORD
- SBP
1 stop8h 46m
United Airlines
Deal found 4/21![United Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
SBP
- ORD
1 stop10h 50m
Alaska Airlines
Wed 5/279:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/309:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Thu 5/289:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$343
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 6/39:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:27 pm
SBP
- ORD
1 stop8h 53m
Alaska Airlines
Sat 5/309:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/302:59 pm
SBP
- ORD
1 stop6h 56m
Alaska Airlines
Wed 6/39:00 am
ORD
- SBP
1 stop7h 19m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$275
One-way flights from San Luis Obispo to IllinoisSearch for one-way flight options from San Luis Obispo to Illinois. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
Search for one-way flight options from San Luis Obispo to Illinois. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
This American Airlines deal was found by Cheapflights users on 4/19. 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.
Tue 7/2112:31 pm
SBP
- ORD
1 stop6h 53m
American Airlines
Deal found 4/19![American Airlines logo]()
$138
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:52 pm
SBP
- ORD
1 stop9h 14m
United Airlines
Deal found 4/20![United Airlines logo]()
$146
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:45 pm
SBP
- ORD
1 stop6h 14m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$175
This Expedia deal was found by Cheapflights users on 4/19. 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.
Sun 7/195:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$180
This American Airlines deal was found by Cheapflights users on 4/22. 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 5/212:55 pm
SBP
- ORD
1 stop7h 05m
American Airlines
Deal found 4/22![American Airlines logo]()
$184
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:20 am
SBP
- ORD
1 stop10h 32m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$210
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$215
This deal was found by Cheapflights users on 4/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:42 pm
SBP
- ORD
1 stop7h 12m
United Airlines
Deal found 4/21![United Airlines logo]()
$225
This American Airlines deal was found by Cheapflights users on 4/19. 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 7/1812:31 pm
SBP
- ORD
2 stops10h 00m
American Airlines
Deal found 4/19![American Airlines logo]()
$235
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/192:59 pm
SBP
- ORD
2 stops13h 21m
Alaska Airlines
Deal found 4/20![Alaska Airlines logo]()
$236
This Expedia deal was found by Cheapflights users on 4/23. 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 5/43:39 pm
SBP
- ORD
1 stop6h 04m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$242
This deal was found by Cheapflights users on 4/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
SBP
- ORD
1 stop6h 35m
United Airlines
Deal found 4/21![United Airlines logo]()
$279
Find flight deals from San Luis Obispo to Illinois
Keep the following information in mind while searching for San Luis Obispo to Illinois flight deals. Data was last updated April 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $275 (Alaska Airlines) |
One-way from | $138 (American Airlines) |
Popular in | November |
Cheapest in | August |
Average price | $516 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Luis Obispo to Illinois 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 April 24, 2026.
Use the filters below to find and compare flights from San Luis Obispo to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Tue 9/15
12:34 pm-11:12 pm
1 stop8h 38m
Chicago O'Hare Intl
Tue 10/6
6:00 am-11:45 am
1 stop7h 45m
$275
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Tue 7/14
2:06 pm-10:59 pm
1 stop6h 53m
Chicago O'Hare Intl
Sat 7/18
6:10 pm-11:44 pm
1 stop7h 34m
$292
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 5/29
7:27 pm-6:20 am
1 stop8h 53m
Chicago O'Hare Intl
Wed 6/3
9:00 am-2:19 pm
1 stop7h 19m
$312
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Wed 7/8
12:31 pm-10:26 pm
1 stop7h 55m
Chicago O'Hare Intl
Thu 7/16
5:19 pm-10:50 pm
1 stop7h 31m
$312
Quickest round-trip
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sun 5/31
2:59 pm-11:55 pm
1 stop6h 56m
Chicago O'Hare Intl
Wed 6/3
9:00 am-2:19 pm
1 stop7h 19m
$347
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 6/26
2:06 pm-11:43 pm
1 stop7h 37m
Chicago O'Hare Intl
Thu 7/2
4:30 pm-10:12 pm
1 stop7h 42m
$349
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Mon 6/22
5:57 pm-1:21 pm
1 stop17h 24m
Chicago O'Hare Intl
Mon 6/29
7:59 pm-5:17 pm
1 stop23h 18m
$349
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Thu 7/16
6:04 am-6:57 pm
1 stop10h 53m
Chicago O'Hare Intl
Mon 7/20
7:59 pm-5:17 pm
1 stop23h 18m
$349
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Tue 5/5
2:15 pm-11:29 pm
1 stop7h 14m
Chicago O'Hare Intl
Sat 5/9
2:15 pm-8:00 pm
1 stop7h 45m
$367
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Wed 9/2
10:52 am-9:24 pm
1 stop8h 32m
Chicago O'Hare Intl
Sat 9/5
1:58 pm-7:47 pm
1 stop7h 49m
$375
Showing 1-10 of 24 resultsSorted by cheapest first
Best time to book a flight from San Luis Obispo to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Luis Obispo with our price prediction graph.
SBP-ORD
SBP-PIA
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 San Luis Obispo to Illinois
SBP-USIL
SBP-ORD
SBP-PIA
What is the cheapest month to book a flight from San Luis Obispo to Illinois?
Currently, August is the cheapest month in which you can book a flight from San Luis Obispo to Illinois (average of $230). Flying from San Luis Obispo to Illinois in June is currently the most expensive (average of $439). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SBP to IL?
Find hourly flight availability from San Luis Obispo to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Luis Obispo to Illinois as you normally would.
How much does it cost to fly round-trip from San Luis Obispo to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 24, 2026.
Read reviews from past customers who have flown Alaska Airlines,United Airlines, andAmerican Airlines from San Luis Obispo to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from San Luis Obispo to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for San Luis Obispo to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Luis Obispo to Illinois by cabin class
Find flights from San Luis Obispo to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Luis Obispo and Illinois flights
Browse other San Luis Obispo and Illinois flight options. Last updated on April 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Luis Obispo to Illinois flights
Consider these flights traveling from San Luis Obispo to Illinois.
Top 2 airlines flying from San Luis Obispo to Illinois
Discover the top 2 airlines that operate flights from San Luis Obispo to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$274 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$391 | Average$584 | FlexibilityNo cancel fee | On-time69% |