Flights Chicago → San Juan
As of October 2026, economy flights from Chicago to San Juan have a typical range USD 640–1114, median USD 826. Full range across all 188 offers: USD 562–4280. We analyzed 188 offers from 10 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Chicago → San Juan
Based on 188 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Chicago → San Juan
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| American Airlines | Included | USD 35 | — |
| Southwest | — | USD 90 | — |
| United Airlines | — | — | — |
| Southwest Airlines | Included | Included | — |
| jetBlue | Included | USD 35 | — |
| Delta | Included | USD 90 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Chicago to San Juan cost?
Based on 188 offers · October 2026
Chicago to San Juan flights ranged from USD 562 to USD 4280 across 188 offers analyzed in October 2026. The chart below shows how prices distributed across all 188 offers.
These 188 offers (October 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 771 and USD 852
What hidden fees do Chicago to San Juan flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Chicago to San Juan routes. The breakdown below is based on 188 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 33 | 4% |
| AA | 45 | 4% |
| Southwest | 90 | 13% |
| UA | 54 | 6% |
| WN | 11 | 1% |
| B6 | 45 | 6% |
| DL | 40 | 1% |
Southwest: base ~USD 550 + fees USD 90 = ~USD 640 total. Southwest Airlines: base ~USD 825 + fees USD 11 = ~USD 836 total.
Southwest's USD 90 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 275 base difference shrinks to USD 196 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Chicago to San Juan?
10 airlines flew Chicago to San Juan in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (Southwest), fares ranged USD 640–730 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Southwest | 5 | 640–730 | 640 | 90 (14%) |
 Frontier Airlines | 41 | 634–878 | 738 | 33 (5%) |
 United | 3 | 707–798 | 754 | n/a |
 Frontier | 9 | 581–911 | 756 | n/a |
 B6 | 4 | 764–812 | 788 | 45 (6%) |
 United Airlines | 17 | 772–1385 | 816 | 54 (7%) |
 American | 14 | 719–825 | 825 | n/a |
 Southwest Airlines | 73 | 796–1087 | 836 | 11 (1%) |
 American Airlines | 19 | 623–1541 | 1064 | 45 (4%) |
 Delta Air Lines | 3 | 2109–4227 | 4015 | 40 (1%) |
Where do the best Chicago → San Juan prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Chicago to San Juan flights
- Full-service carriers on Chicago–San Juan cost 2.0x more than budget airlines (USD 1495 vs USD 752 median; overall median USD 826).
- Southwest charges 8.1x more in ancillary fees than WN — USD 90 vs USD 11 avg per booking.
- The same route priced USD 250 apart depending on where it was booked — the lowest median was USD 623. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Chicago to San Juan cost?
- Based on 188 offers analyzed, Chicago to San Juan flights range from USD 562 to USD 4280, with a median price of USD 826. Search for your specific dates →
- What hidden fees should I expect on Chicago to San Juan flights?
- On average, ancillary fees (bags, seat selection) add USD 29 to the base fare on Chicago to San Juan flights. See itemized fees for your itinerary →
- Which airline is cheapest on Chicago to San Juan including all fees?
- Southwest has the lowest median fare on Chicago to San Juan at USD 640 (median across 5 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Chicago–San Juan flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 623. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Chicago to San Juan routes?
- Chicago to San Juan has 10 airlines competing, creating a price range from USD 562 to USD 4280 across 188 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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