$143+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
Jul 9 — Jul 161
Round-trip
1 adult, Economy
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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 June 9, 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 June 9, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 9/13:24 pm
SBP
- ORD
1 stop19h 58m
Alaska Airlines
Sat 9/56:01 am
ORD
- SBP
1 stop10h 43m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:00 pm
SBP
- ORD
2 stops8h 30m
American Airlines
Tue 10/63:22 pm
ORD
- SBP
1 stop8h 40m
American Airlines
Deal found 6/4![American Airlines logo]()
$290
This American Airlines deal was found by Cheapflights users on 6/5. 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.
Tue 9/112:45 pm
SBP
- ORD
2 stops9h 33m
American Airlines
Sat 9/55:00 am
ORD
- SBP
2 stops8h 58m
American Airlines
Deal found 6/5![American Airlines logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 9/63:24 pm
SBP
- ORD
1 stop6h 35m
Alaska Airlines
Wed 9/97:20 am
ORD
- SBP
1 stop9h 24m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$322
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:51 pm
SBP
- ORD
1 stop8h 12m
American Airlines
Tue 9/2211:00 am
ORD
- SBP
2 stops9h 34m
American Airlines
Deal found 6/4![American Airlines logo]()
$327
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Sat 7/412:42 pm
SBP
- ORD
1 stop5h 58m
United Airlines
Sat 7/116:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/6![United Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 6/2712:42 pm
SBP
- ORD
1 stop8h 07m
United Airlines
Sat 7/116:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/7![United Airlines logo]()
$336
This United Airlines deal was found by Cheapflights users on 6/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:45 am
SBP
- PIA
2 stops11h 02m
United Airlines
Sat 10/318:50 am
PIA
- SBP
2 stops11h 06m
United Airlines
Deal found 6/4![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 8/18:35 pm
SBP
- PIA
2 stops11h 34m
United Airlines
Sat 8/81:13 pm
PIA
- SBP
2 stops10h 59m
United Airlines
Deal found 6/8![United Airlines logo]()
$618
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 6/2011:05 am
SBP
- PIA
2 stops10h 15m
United Airlines
Sat 6/278:30 am
PIA
- SBP
2 stops14h 20m
United Airlines
Deal found 6/8![United Airlines logo]()
$641
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 June 9, 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 June 9, 2026.
This United Airlines deal was found by Cheapflights users on 6/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:28 pm
SBP
- ORD
1 stop7h 29m
United Airlines
Wed 7/156:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/4![United Airlines logo]()
$285
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 9/16:00 am
SBP
- ORD
1 stop11h 21m
Alaska Airlines
Sat 9/56:01 am
ORD
- SBP
1 stop10h 43m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 6/7. 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 9/151:00 pm
SBP
- ORD
2 stops8h 30m
American Airlines
Tue 10/66:00 am
ORD
- SBP
1 stop7h 45m
American Airlines
Deal found 6/7![American Airlines logo]()
$300
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:31 pm
SBP
- ORD
1 stop7h 33m
American Airlines
Tue 9/225:00 am
ORD
- SBP
1 stop9h 11m
American Airlines
Deal found 6/4![American Airlines logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 6/8. 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 9/73:24 pm
SBP
- ORD
1 stop6h 35m
Alaska Airlines
Tue 9/157:20 am
ORD
- SBP
1 stop9h 24m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 6/2712:42 pm
SBP
- ORD
1 stop8h 07m
United Airlines
Sat 7/116:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/7![United Airlines logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 7/35:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Tue 7/77:59 pm
ORD
- SBP
1 stop23h 18m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$332
This American Airlines deal was found by Cheapflights users on 6/7. 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 6/2712:28 pm
SBP
- ORD
2 stops9h 04m
American Airlines
Sat 7/115:00 am
ORD
- SBP
1 stop8h 49m
American Airlines
Deal found 6/7![American Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/112:52 pm
SBP
- ORD
1 stop9h 47m
American Airlines
Sat 7/115:00 am
ORD
- SBP
1 stop8h 49m
American Airlines
Deal found 6/8![American Airlines logo]()
$388
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:50 pm
SBP
- ORD
1 stop9h 30m
Alaska Airlines
Fri 9/112:22 pm
ORD
- SBP
1 stop7h 39m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 6/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:45 am
SBP
- PIA
2 stops11h 02m
United Airlines
Sat 10/318:50 am
PIA
- SBP
2 stops11h 06m
United Airlines
Deal found 6/4![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 6/2011:05 am
SBP
- PIA
2 stops10h 15m
United Airlines
Sat 6/278:30 am
PIA
- SBP
2 stops14h 20m
United Airlines
Deal found 6/8![United Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 8/112:42 pm
SBP
- PIA
1 stop6h 19m
United Airlines
Sat 8/88:45 am
PIA
- SBP
1 stop6h 24m
United Airlines
Deal found 6/8![United Airlines logo]()
$983
This United Airlines deal was found by Cheapflights users on 6/6. 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 6/215:00 am
SBP
- PIA
1 stop14h 01m
United Airlines
Thu 6/252:33 pm
PIA
- SBP
2 stops11h 11m
United Airlines
Deal found 6/6![United Airlines logo]()
$1,160
Last-minute flights from San Luis Obispo to IllinoisDiscover last-minute flight deals from San Luis Obispo to Illinois. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Luis Obispo to Illinois. Data last updated June 9, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 6/2011:05 am
SBP
- PIA
2 stops10h 15m
United Airlines
Sat 6/278:30 am
PIA
- SBP
2 stops14h 20m
United Airlines
Deal found 6/8![United Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 6/6. 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 6/216:05 pm
SBP
- PIA
2 stops14h 05m
United Airlines
Thu 6/252:33 pm
PIA
- SBP
2 stops11h 11m
United Airlines
Deal found 6/6![United Airlines logo]()
$1,057
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 6/2712:42 pm
SBP
- ORD
1 stop8h 07m
United Airlines
Sat 7/116:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/7![United Airlines logo]()
$336
This American Airlines deal was found by Cheapflights users on 6/7. 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 6/2712:28 pm
SBP
- ORD
2 stops9h 04m
American Airlines
Sat 7/115:00 am
ORD
- SBP
1 stop8h 49m
American Airlines
Deal found 6/7![American Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 6/5. 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.
Wed 7/112:52 pm
SBP
- ORD
1 stop9h 47m
American Airlines
Sat 7/115:00 am
ORD
- SBP
1 stop8h 49m
American Airlines
Deal found 6/5![American Airlines logo]()
$383
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 7/35:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Tue 7/77:59 pm
ORD
- SBP
1 stop23h 18m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$332
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Sat 7/412:42 pm
SBP
- ORD
1 stop5h 58m
United Airlines
Sat 7/116:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/6![United Airlines logo]()
$331
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 7/46:04 am
SBP
- ORD
1 stop11h 33m
Alaska Airlines
Sat 7/117:20 am
ORD
- SBP
1 stop11h 35m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 6/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:28 pm
SBP
- ORD
1 stop7h 29m
United Airlines
Wed 7/156:10 am
ORD
- SBP
1 stop7h 28m
United Airlines
Deal found 6/4![United Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/84:07 pm
SBP
- ORD
1 stop6h 44m
American Airlines
Wed 7/156:04 am
ORD
- SBP
1 stop7h 39m
American Airlines
Deal found 6/8![American Airlines logo]()
$295
This Expedia deal was found by Cheapflights users on 6/5. 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 7/95:57 pm
SBP
- ORD
1 stop17h 24m
Alaska Airlines
Mon 7/137:59 pm
ORD
- SBP
1 stop23h 18m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/2912:29 pm
SBP
- ORD
1 stop9h 01m
American Airlines
Wed 8/55:00 am
ORD
- SBP
2 stops8h 52m
American Airlines
Deal found 6/8![American Airlines logo]()
$337
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 June 9, 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 June 9, 2026.
This Priceline deal was found by Cheapflights users on 6/8. 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.
Wed 7/155:50 pm
SBP
- ORD
1 stop9h 10m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$143
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/1512:29 pm
SBP
- ORD
1 stop9h 01m
American Airlines
Deal found 6/8![American Airlines logo]()
$148
This American Airlines deal was found by Cheapflights users on 6/8. 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 9/512:45 pm
SBP
- ORD
2 stops9h 33m
American Airlines
Deal found 6/8![American Airlines logo]()
$153
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/52:27 pm
SBP
- ORD
1 stop7h 22m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$180
This Priceline deal was found by Cheapflights users on 6/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:20 pm
SBP
- ORD
1 stop9h 40m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$184
This American Airlines deal was found by Cheapflights users on 6/7. 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.
Thu 10/157:34 pm
SBP
- ORD
1 stop8h 12m
American Airlines
Deal found 6/7![American Airlines logo]()
$185
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2712:28 pm
SBP
- ORD
2 stops9h 04m
American Airlines
Deal found 6/4![American Airlines logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/285:20 pm
SBP
- ORD
1 stop9h 40m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$190
This American Airlines deal was found by Cheapflights users on 6/6. 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 8/1112:45 pm
SBP
- ORD
2 stops9h 33m
American Airlines
Deal found 6/6![American Airlines logo]()
$198
This American Airlines deal was found by Cheapflights users on 6/8. 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 9/212:45 pm
SBP
- ORD
2 stops9h 33m
American Airlines
Deal found 6/8![American Airlines logo]()
$203
This United Airlines deal was found by Cheapflights users on 6/8. 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 7/102:06 pm
SBP
- ORD
1 stop8h 53m
United Airlines
Deal found 6/8![United Airlines logo]()
$235
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 June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $285 (Alaska Airlines) |
One-way from | $143 (Priceline) |
Popular in | November |
Cheapest in | August |
Average price | $609 |
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 June 9, 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
Wed 7/8
8:28 pm-5:57 am
1 stop7h 29m
Chicago O'Hare Intl
Wed 7/15
6:10 am-11:38 am
1 stop7h 28m
$285
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Tue 9/1
6:00 am-7:21 pm
1 stop11h 21m
Chicago O'Hare Intl
Sat 9/5
6:01 am-2:44 pm
1 stop10h 43m
$285
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Tue 9/15
1:00 pm-11:30 pm
2 stops8h 30m
Chicago O'Hare Intl
Tue 10/6
6:00 am-11:45 am
1 stop7h 45m
$300
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Thu 9/17
12:31 pm-10:04 pm
1 stop7h 33m
Chicago O'Hare Intl
Tue 9/22
5:00 am-12:11 pm
1 stop9h 11m
$322
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Mon 9/7
3:24 pm-11:59 pm
1 stop6h 35m
Chicago O'Hare Intl
Tue 9/15
7:20 am-2:44 pm
1 stop9h 24m
$322
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 7/3
5:57 pm-1:21 pm
1 stop17h 24m
Chicago O'Hare Intl
Tue 7/7
7:59 pm-5:17 pm
1 stop23h 18m
$332
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sat 6/27
12:42 pm-10:49 pm
1 stop8h 07m
Chicago O'Hare Intl
Sat 7/11
6:10 am-11:38 am
1 stop7h 28m
$336
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sat 6/27
12:28 pm-11:32 pm
2 stops9h 04m
Chicago O'Hare Intl
Sat 7/11
5:00 am-11:49 am
1 stop8h 49m
$341
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Wed 7/1
12:52 pm-12:39 am
1 stop9h 47m
Chicago O'Hare Intl
Sat 7/11
5:00 am-11:49 am
1 stop8h 49m
$388
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sat 9/5
6:50 pm-6:20 am
1 stop9h 30m
Chicago O'Hare Intl
Fri 9/11
2:22 pm-8:01 pm
1 stop7h 39m
$409
Showing 1-10 of 23 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 November is currently the most expensive (average of $364). 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 June 9, 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 June 9, 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.
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.1
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.1
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.1
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.1
Entertainment
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.
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Alternative routes for San Luis Obispo to Illinois
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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 June 9, 2026.
Popular flight searches
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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 June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$274 | Average$432 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$373 | Average$550 | FlexibilityNo cancel fee | On-time69% |